diff --git a/arkindex/documents/fixtures/data.json b/arkindex/documents/fixtures/data.json
index a8f8c9cd9137262b6acfc5564119fdd95b4b7f04..4702afccc3d4485403b3cfff8be3e4152ff07a74 100644
--- a/arkindex/documents/fixtures/data.json
+++ b/arkindex/documents/fixtures/data.json
@@ -1,25 +1,24 @@
 [
 {
     "model": "process.process",
-    "pk": "6fb4ded9-ab97-4764-b0b0-4a7040556cde",
+    "pk": "9f2362e7-9e74-431a-8c5f-7a54a43fd5a8",
     "fields": {
         "created": "2020-02-02T01:23:45.678Z",
         "updated": "2020-02-02T01:23:45.678Z",
         "name": "Process fixture",
         "creator": 2,
-        "corpus": "35d72d0a-7d7a-4165-ad65-a863725a470f",
+        "corpus": "206d6f86-a96c-4fd7-a097-0e5fa82de5d3",
         "mode": "workers",
         "activity_state": "disabled",
         "started": null,
         "finished": null,
-        "farm": "0464874a-12cd-4bb5-a06f-37a872a82e5a",
+        "farm": "dd6f9265-24cf-4773-9e61-a42853278337",
         "element": null,
         "folder_type": null,
         "element_type": null,
         "name_contains": null,
         "ml_class": null,
         "load_children": false,
-        "generate_thumbnails": false,
         "chunks": 1,
         "use_cache": false,
         "use_gpu": false,
@@ -31,7 +30,7 @@
 },
 {
     "model": "process.process",
-    "pk": "89fbd695-bd87-4a1d-afef-8647a30d3ccc",
+    "pk": "ca34111d-1329-4b71-b322-688239e27b33",
     "fields": {
         "created": "2020-02-02T01:23:45.678Z",
         "updated": "2020-02-02T01:23:45.678Z",
@@ -49,7 +48,6 @@
         "name_contains": null,
         "ml_class": null,
         "load_children": false,
-        "generate_thumbnails": false,
         "chunks": 1,
         "use_cache": false,
         "use_gpu": false,
@@ -61,7 +59,7 @@
 },
 {
     "model": "process.process",
-    "pk": "fb8b6046-9aa6-454d-8e0b-472f93605016",
+    "pk": "de1be14d-6a0c-4229-8d45-886c03cd8781",
     "fields": {
         "created": "2020-02-02T01:23:45.678Z",
         "updated": "2020-02-02T01:23:45.678Z",
@@ -79,7 +77,6 @@
         "name_contains": null,
         "ml_class": null,
         "load_children": false,
-        "generate_thumbnails": false,
         "chunks": 1,
         "use_cache": false,
         "use_gpu": false,
@@ -91,123 +88,123 @@
 },
 {
     "model": "process.repository",
-    "pk": "a7c6b0d5-d68c-48f7-a07b-09e0522a4d5c",
+    "pk": "14f8f60b-d8ae-44a1-a45e-91ce272f4879",
     "fields": {
         "url": "http://my_repo.fake/workers/worker"
     }
 },
 {
     "model": "process.repository",
-    "pk": "e3e6edfa-da1c-46a1-85be-24c0c5308fdd",
+    "pk": "570e432a-870a-491a-b877-6acf8f864e19",
     "fields": {
         "url": "http://gitlab/repo"
     }
 },
 {
     "model": "process.revision",
-    "pk": "179c0b17-cfa7-4157-bba0-83c83d58ee62",
+    "pk": "11f73350-e6c8-452b-ac17-1dd07940f6b0",
     "fields": {
         "created": "2020-02-02T01:23:45.678Z",
         "updated": "2020-02-02T01:23:45.678Z",
-        "repo": "a7c6b0d5-d68c-48f7-a07b-09e0522a4d5c",
-        "hash": "1337",
-        "message": "My w0rk3r",
-        "author": "Test user"
+        "repo": "570e432a-870a-491a-b877-6acf8f864e19",
+        "hash": "42",
+        "message": "Salve",
+        "author": "Some user"
     }
 },
 {
     "model": "process.revision",
-    "pk": "e67d4944-5167-4f45-bfac-2a4d92bbd177",
+    "pk": "76215c8a-9b35-4e69-97cd-2a363c471139",
     "fields": {
         "created": "2020-02-02T01:23:45.678Z",
         "updated": "2020-02-02T01:23:45.678Z",
-        "repo": "e3e6edfa-da1c-46a1-85be-24c0c5308fdd",
-        "hash": "42",
-        "message": "Salve",
-        "author": "Some user"
+        "repo": "14f8f60b-d8ae-44a1-a45e-91ce272f4879",
+        "hash": "1337",
+        "message": "My w0rk3r",
+        "author": "Test user"
     }
 },
 {
     "model": "process.worker",
-    "pk": "7290f39e-fa17-4e7f-a051-a0e573c3ff6b",
+    "pk": "3d08cae6-8246-43a8-995c-46b12d319cca",
     "fields": {
-        "name": "Recognizer",
-        "slug": "reco",
-        "type": "ab7333fc-34e8-4fb6-a3bb-d733443cbe51",
+        "name": "Custom worker",
+        "slug": "custom",
+        "type": "96d9c3ce-557e-4156-8a34-02e2dd500f2e",
         "description": "",
-        "repository": "a7c6b0d5-d68c-48f7-a07b-09e0522a4d5c",
+        "repository": null,
         "public": false,
         "archived": null
     }
 },
 {
     "model": "process.worker",
-    "pk": "7c61dba0-4fdc-494f-b587-abddc75b8dbb",
+    "pk": "487638f7-b88d-43a7-87c5-5523ec27374a",
     "fields": {
         "name": "Generic worker with a Model",
         "slug": "generic",
-        "type": "ab7333fc-34e8-4fb6-a3bb-d733443cbe51",
+        "type": "e9e38b3b-ca1a-439f-9e4f-30b14bc3ce75",
         "description": "",
-        "repository": "a7c6b0d5-d68c-48f7-a07b-09e0522a4d5c",
+        "repository": "14f8f60b-d8ae-44a1-a45e-91ce272f4879",
         "public": false,
         "archived": null
     }
 },
 {
     "model": "process.worker",
-    "pk": "8a27660c-f976-4550-834c-84d4ad033214",
+    "pk": "551f23ce-09d1-40f4-aec1-b8ed5fbc234f",
     "fields": {
-        "name": "Worker requiring a GPU",
-        "slug": "worker-gpu",
-        "type": "7af4b709-efd8-4882-b6be-6b408ebf9b2d",
+        "name": "File import",
+        "slug": "file_import",
+        "type": "7c005c72-ea87-4226-b299-f42cb217550e",
         "description": "",
-        "repository": "a7c6b0d5-d68c-48f7-a07b-09e0522a4d5c",
+        "repository": "14f8f60b-d8ae-44a1-a45e-91ce272f4879",
         "public": false,
         "archived": null
     }
 },
 {
     "model": "process.worker",
-    "pk": "af68bb34-5eaa-4edc-81fa-4400af06a715",
+    "pk": "958117cd-f5b7-49e7-80dd-872d26af6367",
     "fields": {
-        "name": "Custom worker",
-        "slug": "custom",
-        "type": "7fedc658-ecaa-4727-8844-71663ec6d0a9",
+        "name": "Worker requiring a GPU",
+        "slug": "worker-gpu",
+        "type": "8f637bcd-038f-46ac-b727-1235a7d59134",
         "description": "",
-        "repository": null,
+        "repository": "14f8f60b-d8ae-44a1-a45e-91ce272f4879",
         "public": false,
         "archived": null
     }
 },
 {
     "model": "process.worker",
-    "pk": "bc503daa-b53f-45ef-9d90-7f6a24d028a1",
+    "pk": "a2b24ca6-c4b0-4867-bae2-fcf9e7135032",
     "fields": {
         "name": "Document layout analyser",
         "slug": "dla",
-        "type": "26ca87e4-afb3-4e0f-bc1a-b0641c7dd427",
+        "type": "76f9adf0-2fb7-4ebe-9ae8-ed7535407bdd",
         "description": "",
-        "repository": "a7c6b0d5-d68c-48f7-a07b-09e0522a4d5c",
+        "repository": "14f8f60b-d8ae-44a1-a45e-91ce272f4879",
         "public": false,
         "archived": null
     }
 },
 {
     "model": "process.worker",
-    "pk": "d757e5ad-a03e-4e81-bf81-0b2a8719220e",
+    "pk": "b7b4f769-4ccb-4b1e-a701-280ba8013e0b",
     "fields": {
-        "name": "File import",
-        "slug": "file_import",
-        "type": "f2a53f25-1ffe-423e-b9c4-ee5a01a2b5a0",
+        "name": "Recognizer",
+        "slug": "reco",
+        "type": "e9e38b3b-ca1a-439f-9e4f-30b14bc3ce75",
         "description": "",
-        "repository": "a7c6b0d5-d68c-48f7-a07b-09e0522a4d5c",
+        "repository": "14f8f60b-d8ae-44a1-a45e-91ce272f4879",
         "public": false,
         "archived": null
     }
 },
 {
     "model": "process.workertype",
-    "pk": "26ca87e4-afb3-4e0f-bc1a-b0641c7dd427",
+    "pk": "76f9adf0-2fb7-4ebe-9ae8-ed7535407bdd",
     "fields": {
         "created": "2020-02-02T01:23:45.678Z",
         "updated": "2020-02-02T01:23:45.678Z",
@@ -217,56 +214,54 @@
 },
 {
     "model": "process.workertype",
-    "pk": "7af4b709-efd8-4882-b6be-6b408ebf9b2d",
+    "pk": "7c005c72-ea87-4226-b299-f42cb217550e",
     "fields": {
         "created": "2020-02-02T01:23:45.678Z",
         "updated": "2020-02-02T01:23:45.678Z",
-        "slug": "worker",
-        "display_name": "Worker requiring a GPU"
+        "slug": "import",
+        "display_name": "Import"
     }
 },
 {
     "model": "process.workertype",
-    "pk": "7fedc658-ecaa-4727-8844-71663ec6d0a9",
+    "pk": "8f637bcd-038f-46ac-b727-1235a7d59134",
     "fields": {
         "created": "2020-02-02T01:23:45.678Z",
         "updated": "2020-02-02T01:23:45.678Z",
-        "slug": "custom",
-        "display_name": "Custom"
+        "slug": "worker",
+        "display_name": "Worker requiring a GPU"
     }
 },
 {
     "model": "process.workertype",
-    "pk": "ab7333fc-34e8-4fb6-a3bb-d733443cbe51",
+    "pk": "96d9c3ce-557e-4156-8a34-02e2dd500f2e",
     "fields": {
         "created": "2020-02-02T01:23:45.678Z",
         "updated": "2020-02-02T01:23:45.678Z",
-        "slug": "recognizer",
-        "display_name": "Recognizer"
+        "slug": "custom",
+        "display_name": "Custom"
     }
 },
 {
     "model": "process.workertype",
-    "pk": "f2a53f25-1ffe-423e-b9c4-ee5a01a2b5a0",
+    "pk": "e9e38b3b-ca1a-439f-9e4f-30b14bc3ce75",
     "fields": {
         "created": "2020-02-02T01:23:45.678Z",
         "updated": "2020-02-02T01:23:45.678Z",
-        "slug": "import",
-        "display_name": "Import"
+        "slug": "recognizer",
+        "display_name": "Recognizer"
     }
 },
 {
     "model": "process.workerversion",
-    "pk": "148946e9-5ddd-42d2-ad29-bf78ca55f62c",
+    "pk": "0306d1e0-39e0-401f-840b-4ab885f2d627",
     "fields": {
-        "worker": "8a27660c-f976-4550-834c-84d4ad033214",
-        "revision": "179c0b17-cfa7-4157-bba0-83c83d58ee62",
+        "worker": "551f23ce-09d1-40f4-aec1-b8ed5fbc234f",
+        "revision": "76215c8a-9b35-4e69-97cd-2a363c471139",
         "version": null,
-        "configuration": {
-            "test": 42
-        },
+        "configuration": {},
         "state": "available",
-        "gpu_usage": "required",
+        "gpu_usage": "disabled",
         "model_usage": "disabled",
         "docker_image": null,
         "docker_image_iid": "registry.somewhere.com/something:latest",
@@ -276,9 +271,9 @@
 },
 {
     "model": "process.workerversion",
-    "pk": "194b33ea-4a45-4884-9a89-dd04c5a65fc3",
+    "pk": "51d03bd9-0ca8-40fd-a231-f03ad9d301c6",
     "fields": {
-        "worker": "af68bb34-5eaa-4edc-81fa-4400af06a715",
+        "worker": "3d08cae6-8246-43a8-995c-46b12d319cca",
         "revision": null,
         "version": 1,
         "configuration": {
@@ -295,16 +290,16 @@
 },
 {
     "model": "process.workerversion",
-    "pk": "505988ea-21cb-4011-ad87-48bdab37237d",
+    "pk": "8359b5f9-c69f-4709-9736-090c51c70d07",
     "fields": {
-        "worker": "7290f39e-fa17-4e7f-a051-a0e573c3ff6b",
-        "revision": "179c0b17-cfa7-4157-bba0-83c83d58ee62",
+        "worker": "958117cd-f5b7-49e7-80dd-872d26af6367",
+        "revision": "76215c8a-9b35-4e69-97cd-2a363c471139",
         "version": null,
         "configuration": {
             "test": 42
         },
         "state": "available",
-        "gpu_usage": "disabled",
+        "gpu_usage": "required",
         "model_usage": "disabled",
         "docker_image": null,
         "docker_image_iid": "registry.somewhere.com/something:latest",
@@ -314,17 +309,17 @@
 },
 {
     "model": "process.workerversion",
-    "pk": "6ee6d026-1ea4-4435-98a1-a811aed6304e",
+    "pk": "89cdf4f7-efe9-4387-91cc-fc7aa9bac2f7",
     "fields": {
-        "worker": "7c61dba0-4fdc-494f-b587-abddc75b8dbb",
-        "revision": "179c0b17-cfa7-4157-bba0-83c83d58ee62",
+        "worker": "a2b24ca6-c4b0-4867-bae2-fcf9e7135032",
+        "revision": "76215c8a-9b35-4e69-97cd-2a363c471139",
         "version": null,
         "configuration": {
             "test": 42
         },
         "state": "available",
         "gpu_usage": "disabled",
-        "model_usage": "required",
+        "model_usage": "disabled",
         "docker_image": null,
         "docker_image_iid": "registry.somewhere.com/something:latest",
         "created": "2020-02-02T01:23:45.678Z",
@@ -333,17 +328,17 @@
 },
 {
     "model": "process.workerversion",
-    "pk": "9da1ac9d-0ff7-44fc-923f-3076a5bead35",
+    "pk": "d856b4de-d72b-46a5-a396-34cbf1a9b333",
     "fields": {
-        "worker": "bc503daa-b53f-45ef-9d90-7f6a24d028a1",
-        "revision": "179c0b17-cfa7-4157-bba0-83c83d58ee62",
+        "worker": "487638f7-b88d-43a7-87c5-5523ec27374a",
+        "revision": "76215c8a-9b35-4e69-97cd-2a363c471139",
         "version": null,
         "configuration": {
             "test": 42
         },
         "state": "available",
         "gpu_usage": "disabled",
-        "model_usage": "disabled",
+        "model_usage": "required",
         "docker_image": null,
         "docker_image_iid": "registry.somewhere.com/something:latest",
         "created": "2020-02-02T01:23:45.678Z",
@@ -352,12 +347,14 @@
 },
 {
     "model": "process.workerversion",
-    "pk": "d822aa98-530d-46a9-b82b-d64eeb4668a6",
+    "pk": "e14c27a7-2525-42e8-8aea-2f9c8b38c708",
     "fields": {
-        "worker": "d757e5ad-a03e-4e81-bf81-0b2a8719220e",
-        "revision": "179c0b17-cfa7-4157-bba0-83c83d58ee62",
+        "worker": "b7b4f769-4ccb-4b1e-a701-280ba8013e0b",
+        "revision": "76215c8a-9b35-4e69-97cd-2a363c471139",
         "version": null,
-        "configuration": {},
+        "configuration": {
+            "test": 42
+        },
         "state": "available",
         "gpu_usage": "disabled",
         "model_usage": "disabled",
@@ -369,10 +366,10 @@
 },
 {
     "model": "process.workerrun",
-    "pk": "2dee3bf1-8c3a-4999-ae74-6801a141eea5",
+    "pk": "4a6c05a1-9f5f-41b1-8c55-9942d68f4fbe",
     "fields": {
-        "process": "fb8b6046-9aa6-454d-8e0b-472f93605016",
-        "version": "194b33ea-4a45-4884-9a89-dd04c5a65fc3",
+        "process": "ca34111d-1329-4b71-b322-688239e27b33",
+        "version": "51d03bd9-0ca8-40fd-a231-f03ad9d301c6",
         "model_version": null,
         "parents": "[]",
         "configuration": null,
@@ -384,14 +381,14 @@
 },
 {
     "model": "process.workerrun",
-    "pk": "54d16192-ce9d-4fad-9e4b-b5692787a03a",
+    "pk": "561ff70e-282b-4ef0-9405-065658bee696",
     "fields": {
-        "process": "6fb4ded9-ab97-4764-b0b0-4a7040556cde",
-        "version": "9da1ac9d-0ff7-44fc-923f-3076a5bead35",
+        "process": "de1be14d-6a0c-4229-8d45-886c03cd8781",
+        "version": "51d03bd9-0ca8-40fd-a231-f03ad9d301c6",
         "model_version": null,
         "parents": "[]",
         "configuration": null,
-        "summary": "Worker Document layout analyser @ 9da1ac",
+        "summary": "Worker Custom worker @ version 1",
         "created": "2020-02-02T01:23:45.678Z",
         "updated": "2020-02-02T01:23:45.678Z",
         "has_results": false
@@ -399,14 +396,14 @@
 },
 {
     "model": "process.workerrun",
-    "pk": "c2f94771-d640-4c59-9920-a602c85fba61",
+    "pk": "75dc71dd-4eb2-45d3-bbb6-ad05bf7f252e",
     "fields": {
-        "process": "6fb4ded9-ab97-4764-b0b0-4a7040556cde",
-        "version": "505988ea-21cb-4011-ad87-48bdab37237d",
+        "process": "9f2362e7-9e74-431a-8c5f-7a54a43fd5a8",
+        "version": "89cdf4f7-efe9-4387-91cc-fc7aa9bac2f7",
         "model_version": null,
-        "parents": "[\"54d16192-ce9d-4fad-9e4b-b5692787a03a\"]",
+        "parents": "[]",
         "configuration": null,
-        "summary": "Worker Recognizer @ 505988",
+        "summary": "Worker Document layout analyser @ 89cdf4",
         "created": "2020-02-02T01:23:45.678Z",
         "updated": "2020-02-02T01:23:45.678Z",
         "has_results": false
@@ -414,14 +411,14 @@
 },
 {
     "model": "process.workerrun",
-    "pk": "f3246aec-23a7-4127-8368-5bec73b3e7cc",
+    "pk": "527f297e-25be-4cf0-a557-f2679d605c14",
     "fields": {
-        "process": "89fbd695-bd87-4a1d-afef-8647a30d3ccc",
-        "version": "194b33ea-4a45-4884-9a89-dd04c5a65fc3",
+        "process": "9f2362e7-9e74-431a-8c5f-7a54a43fd5a8",
+        "version": "e14c27a7-2525-42e8-8aea-2f9c8b38c708",
         "model_version": null,
-        "parents": "[]",
+        "parents": "[\"75dc71dd-4eb2-45d3-bbb6-ad05bf7f252e\"]",
         "configuration": null,
-        "summary": "Worker Custom worker @ version 1",
+        "summary": "Worker Recognizer @ e14c27",
         "created": "2020-02-02T01:23:45.678Z",
         "updated": "2020-02-02T01:23:45.678Z",
         "has_results": false
@@ -429,7 +426,7 @@
 },
 {
     "model": "documents.corpus",
-    "pk": "35d72d0a-7d7a-4165-ad65-a863725a470f",
+    "pk": "206d6f86-a96c-4fd7-a097-0e5fa82de5d3",
     "fields": {
         "created": "2020-02-02T01:23:45.678Z",
         "updated": "2020-02-02T01:23:45.678Z",
@@ -442,11 +439,11 @@
 },
 {
     "model": "documents.elementtype",
-    "pk": "264b7ce8-9232-49db-bda8-6c081c6817a0",
+    "pk": "335ef2dc-5f04-45d5-8847-bfddc373b272",
     "fields": {
-        "corpus": "35d72d0a-7d7a-4165-ad65-a863725a470f",
-        "slug": "page",
-        "display_name": "Page",
+        "corpus": "206d6f86-a96c-4fd7-a097-0e5fa82de5d3",
+        "slug": "act",
+        "display_name": "Act",
         "folder": false,
         "indexable": false,
         "color": "28b62c"
@@ -454,9 +451,9 @@
 },
 {
     "model": "documents.elementtype",
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@@ -466,23 +463,23 @@
 },
 {
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+    "pk": "4267d9ca-5619-4238-8743-7d0dbf40c89d",
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-        "slug": "act",
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+        "corpus": "206d6f86-a96c-4fd7-a097-0e5fa82de5d3",
+        "slug": "volume",
+        "display_name": "Volume",
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 {
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+        "corpus": "206d6f86-a96c-4fd7-a097-0e5fa82de5d3",
+        "slug": "surface",
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@@ -490,23 +487,23 @@
 },
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-        "slug": "volume",
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+        "corpus": "206d6f86-a96c-4fd7-a097-0e5fa82de5d3",
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+        "corpus": "206d6f86-a96c-4fd7-a097-0e5fa82de5d3",
+        "slug": "word",
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@@ -514,279 +511,279 @@
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@@ -1155,18 +1152,18 @@
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@@ -1174,18 +1171,18 @@
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@@ -1193,18 +1190,18 @@
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@@ -1212,18 +1209,18 @@
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@@ -1231,18 +1228,18 @@
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@@ -1250,13 +1247,13 @@
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@@ -1269,18 +1266,18 @@
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@@ -1307,18 +1304,18 @@
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-        "worker_version": "505988ea-21cb-4011-ad87-48bdab37237d",
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+        "worker_version": "e14c27a7-2525-42e8-8aea-2f9c8b38c708",
         "worker_run": null,
-        "text": "PARIS",
+        "text": "ROY",
         "orientation": "horizontal-lr",
         "confidence": 1.0
     }
 },
 {
     "model": "documents.transcription",
-    "pk": "6d0e6148-db3a-446a-bb16-539ea4255c30",
+    "pk": "66079256-1d7e-4b41-be22-4fe9fec0a743",
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+        "worker_version": "e14c27a7-2525-42e8-8aea-2f9c8b38c708",
         "worker_run": null,
-        "text": "DATUM",
+        "text": "PARIS",
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         "confidence": 1.0
     }
 },
 {
     "model": "documents.transcription",
-    "pk": "7011525f-cae6-4582-b869-ebe16dd93764",
+    "pk": "b09aeb72-4610-4b12-8684-a0b3264652b4",
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-        "worker_version": "505988ea-21cb-4011-ad87-48bdab37237d",
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+        "worker_version": "e14c27a7-2525-42e8-8aea-2f9c8b38c708",
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-        "text": "DATUM",
+        "text": "PARIS",
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         "confidence": 1.0
     }
 },
 {
     "model": "documents.transcription",
-    "pk": "b2595600-d142-4515-a427-3b4b2dcb2d5f",
+    "pk": "c1d6d0c8-2820-4891-b872-81650df49e8c",
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+        "worker_version": "e14c27a7-2525-42e8-8aea-2f9c8b38c708",
         "worker_run": null,
-        "text": "ROY",
+        "text": "Lorem ipsum dolor sit amet",
         "orientation": "horizontal-lr",
         "confidence": 1.0
     }
 },
 {
     "model": "documents.transcription",
-    "pk": "c399e488-675b-49ac-bd6b-a4be34756e87",
+    "pk": "ccf46e07-70c9-4050-be62-4d8adc1bd76f",
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-        "worker_version": "505988ea-21cb-4011-ad87-48bdab37237d",
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+        "worker_version": "e14c27a7-2525-42e8-8aea-2f9c8b38c708",
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-        "text": "ROY",
+        "text": "DATUM",
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         "confidence": 1.0
     }
 },
 {
     "model": "documents.transcription",
-    "pk": "c7d484cd-3080-41aa-b24d-e51fba98ee4e",
+    "pk": "d33e9dcc-4411-4a31-937e-0b5bbbccc2bc",
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-        "worker_version": "505988ea-21cb-4011-ad87-48bdab37237d",
+        "element": "3c8195e1-a172-43dd-89e9-4db0ec39438c",
+        "worker_version": "e14c27a7-2525-42e8-8aea-2f9c8b38c708",
         "worker_run": null,
-        "text": "ROY",
+        "text": "DATUM",
         "orientation": "horizontal-lr",
         "confidence": 1.0
     }
 },
 {
     "model": "documents.allowedmetadata",
-    "pk": "43948eee-60c9-42e1-affd-c72312b7f18e",
+    "pk": "248f6ac6-5ee3-4a5f-b6bd-44dfd38974e5",
     "fields": {
-        "corpus": "35d72d0a-7d7a-4165-ad65-a863725a470f",
-        "type": "text",
-        "name": "folio"
+        "corpus": "206d6f86-a96c-4fd7-a097-0e5fa82de5d3",
+        "type": "location",
+        "name": "location"
     }
 },
 {
     "model": "documents.allowedmetadata",
-    "pk": "58be7836-60ef-43b8-a6ea-e4472f2c0c31",
+    "pk": "c5d77da5-a270-4cc7-ae2c-00f3c2a76ca0",
     "fields": {
-        "corpus": "35d72d0a-7d7a-4165-ad65-a863725a470f",
-        "type": "date",
-        "name": "date"
+        "corpus": "206d6f86-a96c-4fd7-a097-0e5fa82de5d3",
+        "type": "text",
+        "name": "folio"
     }
 },
 {
     "model": "documents.allowedmetadata",
-    "pk": "60567a85-e544-47c4-b300-774308d0a6e8",
+    "pk": "ebf52c92-9329-422a-83dd-013f64fd69b8",
     "fields": {
-        "corpus": "35d72d0a-7d7a-4165-ad65-a863725a470f",
-        "type": "location",
-        "name": "location"
+        "corpus": "206d6f86-a96c-4fd7-a097-0e5fa82de5d3",
+        "type": "date",
+        "name": "date"
     }
 },
 {
     "model": "documents.metadata",
-    "pk": "11db8db6-e672-4fff-bfd6-064a30f1091f",
+    "pk": "19470d61-045c-49e0-838b-7553b6f96b73",
     "fields": {
-        "element": "786a05b3-28db-45f9-9386-d86e4bd2370e",
-        "name": "folio",
+        "element": "aef007bf-09f9-43f5-9110-42feef0ff720",
+        "name": "number",
         "type": "text",
-        "value": "1v",
+        "value": "3",
         "entity": null,
         "worker_version": null,
         "worker_run": null
@@ -1531,12 +1528,12 @@
 },
 {
     "model": "documents.metadata",
-    "pk": "2127a4b5-44d7-4198-b285-45d11263a250",
+    "pk": "4d208b74-48ee-4a7f-9491-7b031654a83d",
     "fields": {
-        "element": "236b450d-874b-40c9-9945-a7307a3be8d9",
+        "element": "81a94dae-4fdc-49e4-a96a-e6c2640f5ad7",
         "name": "folio",
         "type": "text",
-        "value": "2r",
+        "value": "1v",
         "entity": null,
         "worker_version": null,
         "worker_run": null
@@ -1544,12 +1541,12 @@
 },
 {
     "model": "documents.metadata",
-    "pk": "46142d6e-2716-4b13-899d-e25557674722",
+    "pk": "4da1ca8d-7f6c-4150-8bb3-3777158907e9",
     "fields": {
-        "element": "a433b9be-bf1d-4abd-840d-68401750c442",
-        "name": "number",
+        "element": "dc12e918-17f0-4672-b767-4c9c7a229785",
+        "name": "folio",
         "type": "text",
-        "value": "1",
+        "value": "1r",
         "entity": null,
         "worker_version": null,
         "worker_run": null
@@ -1557,12 +1554,12 @@
 },
 {
     "model": "documents.metadata",
-    "pk": "6764ffd2-7a40-4fb2-aa5d-b07be43ec12a",
+    "pk": "5386ae6b-3f68-4798-91d8-1dffc86f9e3b",
     "fields": {
-        "element": "700c1fd5-1f67-4180-aea0-9d6533df44a4",
-        "name": "folio",
+        "element": "92a40b24-7f3d-49a0-9244-18857ef3472d",
+        "name": "number",
         "type": "text",
-        "value": "1r",
+        "value": "2",
         "entity": null,
         "worker_version": null,
         "worker_run": null
@@ -1570,12 +1567,12 @@
 },
 {
     "model": "documents.metadata",
-    "pk": "6b1e5c6f-c428-4bfe-84d1-5d70579a9e7b",
+    "pk": "5b4a8070-3021-4aa5-a8ea-8cd32576605d",
     "fields": {
-        "element": "7d480460-0ab0-4471-a445-f72f2be75b9a",
-        "name": "number",
+        "element": "c9f0ed74-71a7-4a6c-aa6e-4af9a10a7b07",
+        "name": "folio",
         "type": "text",
-        "value": "4",
+        "value": "1r",
         "entity": null,
         "worker_version": null,
         "worker_run": null
@@ -1583,12 +1580,12 @@
 },
 {
     "model": "documents.metadata",
-    "pk": "7d543dfd-2e55-41fe-a396-41fd5f9aa37a",
+    "pk": "61fe6253-a49c-46bf-a1ee-dd541d2870f8",
     "fields": {
-        "element": "173b6549-a747-446d-b073-567ec53f4a10",
+        "element": "ba868f93-f024-4501-9405-454536822065",
         "name": "folio",
         "type": "text",
-        "value": "1r",
+        "value": "2r",
         "entity": null,
         "worker_version": null,
         "worker_run": null
@@ -1596,9 +1593,9 @@
 },
 {
     "model": "documents.metadata",
-    "pk": "8587b8a7-9b30-4018-9295-c069a2d18662",
+    "pk": "9a9607bf-623e-4976-bea0-24e2ec2a93ab",
     "fields": {
-        "element": "eedc30d8-ef94-40f6-843e-1900d15e47de",
+        "element": "5f5a3194-9d00-4977-bd8e-69fd1c80f896",
         "name": "number",
         "type": "text",
         "value": "5",
@@ -1609,9 +1606,9 @@
 },
 {
     "model": "documents.metadata",
-    "pk": "8ab6a879-c132-4712-a985-212c3ba5ccb9",
+    "pk": "c03c034a-2d4d-4ac8-a76d-a3a0ba76e018",
     "fields": {
-        "element": "2dbf8cc9-cc10-4604-8eb5-de5f3718aa17",
+        "element": "b0e720f7-2cfb-4ec1-aa3c-df623c3b24c7",
         "name": "folio",
         "type": "text",
         "value": "1v",
@@ -1622,9 +1619,9 @@
 },
 {
     "model": "documents.metadata",
-    "pk": "a85ec19b-c732-4485-9655-4b6f9ba236fe",
+    "pk": "c2229da6-59ed-4635-a611-8d69c50207b8",
     "fields": {
-        "element": "93c849a1-9e56-4fc8-a3a7-14200103482c",
+        "element": "29ce75c4-1429-410e-bb71-deb1babf8fd9",
         "name": "folio",
         "type": "text",
         "value": "2r",
@@ -1635,12 +1632,12 @@
 },
 {
     "model": "documents.metadata",
-    "pk": "c6840a9a-5db5-45d5-aeef-e231571b499e",
+    "pk": "d32794ff-aba4-4257-b59a-01b398e470c8",
     "fields": {
-        "element": "d23ebc38-5318-46fc-bc1a-62466806723d",
+        "element": "677bc0da-2881-499f-817d-805e1dba35bf",
         "name": "number",
         "type": "text",
-        "value": "3",
+        "value": "4",
         "entity": null,
         "worker_version": null,
         "worker_run": null
@@ -1648,12 +1645,12 @@
 },
 {
     "model": "documents.metadata",
-    "pk": "f8240bb3-b50b-46a6-924c-7ebf057db537",
+    "pk": "f86c291d-b1de-4c92-9bc6-c150ba08ab83",
     "fields": {
-        "element": "21e28831-aac0-4e11-b44a-4bcbd0f4ddf7",
+        "element": "d06899de-4201-48ec-8d4f-2414b1e8ea9e",
         "name": "number",
         "type": "text",
-        "value": "2",
+        "value": "1",
         "entity": null,
         "worker_version": null,
         "worker_run": null
@@ -1676,12 +1673,12 @@
 },
 {
     "model": "images.image",
-    "pk": "0fceb46b-af14-4568-984e-ac26ceb06fa4",
+    "pk": "1cbb097f-9577-44ea-960e-54a2f81eca06",
     "fields": {
         "created": "2020-02-02T01:23:45.678Z",
         "updated": "2020-02-02T01:23:45.678Z",
         "server": 1,
-        "path": "img4",
+        "path": "img3",
         "width": 1000,
         "height": 1000,
         "hash": null,
@@ -1690,12 +1687,12 @@
 },
 {
     "model": "images.image",
-    "pk": "7b3e5017-0c57-45da-aef8-fff14feba411",
+    "pk": "32ce959e-a9a0-4f6b-be79-e185b7181055",
     "fields": {
         "created": "2020-02-02T01:23:45.678Z",
         "updated": "2020-02-02T01:23:45.678Z",
         "server": 1,
-        "path": "img5",
+        "path": "img2",
         "width": 1000,
         "height": 1000,
         "hash": null,
@@ -1704,12 +1701,12 @@
 },
 {
     "model": "images.image",
-    "pk": "a43940c0-254f-4920-b725-7f063bcc0b50",
+    "pk": "4c59cb4d-7832-4362-82e3-2b62370ea778",
     "fields": {
         "created": "2020-02-02T01:23:45.678Z",
         "updated": "2020-02-02T01:23:45.678Z",
         "server": 1,
-        "path": "img6",
+        "path": "img5",
         "width": 1000,
         "height": 1000,
         "hash": null,
@@ -1718,12 +1715,12 @@
 },
 {
     "model": "images.image",
-    "pk": "a4fef864-b712-41df-97cf-29b774450df8",
+    "pk": "749a8cd8-e467-40dd-a04f-1078460d59c5",
     "fields": {
         "created": "2020-02-02T01:23:45.678Z",
         "updated": "2020-02-02T01:23:45.678Z",
         "server": 1,
-        "path": "img2",
+        "path": "img4",
         "width": 1000,
         "height": 1000,
         "hash": null,
@@ -1732,12 +1729,12 @@
 },
 {
     "model": "images.image",
-    "pk": "bd3c8ee4-358a-4a50-90f6-1080b910d615",
+    "pk": "83e3f3a6-c940-4439-b9c8-72c60ad280fa",
     "fields": {
         "created": "2020-02-02T01:23:45.678Z",
         "updated": "2020-02-02T01:23:45.678Z",
         "server": 1,
-        "path": "img1",
+        "path": "img6",
         "width": 1000,
         "height": 1000,
         "hash": null,
@@ -1746,12 +1743,12 @@
 },
 {
     "model": "images.image",
-    "pk": "e48347c1-2047-4e9a-b567-52a9e7b71ac6",
+    "pk": "e3e69ede-2d38-4ad9-adeb-7cf37da22a85",
     "fields": {
         "created": "2020-02-02T01:23:45.678Z",
         "updated": "2020-02-02T01:23:45.678Z",
         "server": 1,
-        "path": "img3",
+        "path": "img1",
         "width": 1000,
         "height": 1000,
         "hash": null,
@@ -1760,56 +1757,56 @@
 },
 {
     "model": "users.right",
-    "pk": "007844fb-44e9-42ff-925f-954e98292c50",
+    "pk": "4792d973-4724-4e9e-b524-4559fa3629ba",
     "fields": {
-        "user": 2,
+        "user": 4,
         "group": null,
         "content_type": 34,
-        "content_id": "d4c0ee9b-6c8e-4667-823b-01cdbf709161",
-        "level": 100
-    }
-},
-{
-    "model": "users.right",
-    "pk": "3f108462-43fd-417f-adbf-f2efcae42d99",
-    "fields": {
-        "user": 2,
-        "group": null,
-        "content_type": 11,
-        "content_id": "0464874a-12cd-4bb5-a06f-37a872a82e5a",
+        "content_id": "cc190b64-fc54-4ae6-8907-9866df928d6d",
         "level": 10
     }
 },
 {
     "model": "users.right",
-    "pk": "6c838d5b-602d-4a59-a890-e0e7b45892d3",
+    "pk": "68e7e725-68ea-4804-a707-56fa812c484d",
     "fields": {
         "user": 3,
         "group": null,
         "content_type": 34,
-        "content_id": "d4c0ee9b-6c8e-4667-823b-01cdbf709161",
+        "content_id": "cc190b64-fc54-4ae6-8907-9866df928d6d",
         "level": 50
     }
 },
 {
     "model": "users.right",
-    "pk": "8e0946ec-f183-4777-9b01-fad1260274d8",
+    "pk": "b180fd9c-826a-41f5-8e62-2410e67d39e3",
     "fields": {
-        "user": 4,
+        "user": 2,
         "group": null,
-        "content_type": 34,
-        "content_id": "d4c0ee9b-6c8e-4667-823b-01cdbf709161",
+        "content_type": 11,
+        "content_id": "dd6f9265-24cf-4773-9e61-a42853278337",
         "level": 10
     }
 },
 {
     "model": "users.right",
-    "pk": "bb2da668-ad2c-4869-900a-fabc8edc1c81",
+    "pk": "cf3580b2-1b6c-4ba7-aa25-29549bca89ae",
     "fields": {
         "user": 2,
         "group": null,
         "content_type": 19,
-        "content_id": "35d72d0a-7d7a-4165-ad65-a863725a470f",
+        "content_id": "206d6f86-a96c-4fd7-a097-0e5fa82de5d3",
+        "level": 100
+    }
+},
+{
+    "model": "users.right",
+    "pk": "d78873f2-9c48-4451-bf4e-eacfb1f4902b",
+    "fields": {
+        "user": 2,
+        "group": null,
+        "content_type": 34,
+        "content_id": "cc190b64-fc54-4ae6-8907-9866df928d6d",
         "level": 100
     }
 },
@@ -1817,7 +1814,7 @@
     "model": "users.user",
     "pk": 1,
     "fields": {
-        "password": "pbkdf2_sha256$390000$QSd65IybrTHuN13us8Mqz3$5D0bK0ZjilS/hgJNYMtiBeGqIyPXT2pS1opEuL2Xw5A=",
+        "password": "pbkdf2_sha256$390000$Lp3r8epd7MAvwpnIvJlfyz$EvnViNTJylIcdh3xVfE0ZYRPrZlFIyMTl8mBzqOHzKo=",
         "last_login": null,
         "email": "root@root.fr",
         "display_name": "Admin",
@@ -1832,7 +1829,7 @@
     "model": "users.user",
     "pk": 2,
     "fields": {
-        "password": "pbkdf2_sha256$390000$TpW8NPlptDOAWz4DsGYUPB$CsXsGa2P8pwWcYLAFkF40X3F8wNyqMl+eDNB/OLs3gw=",
+        "password": "pbkdf2_sha256$390000$G1mEZRqMbJxh2GKqYnE48G$9dRtzWLGIepaEOCg5QH9X0d0nH+adcvrTU2UHs8SUDs=",
         "last_login": null,
         "email": "user@user.fr",
         "display_name": "Test user",
@@ -1875,7 +1872,7 @@
 },
 {
     "model": "users.group",
-    "pk": "d4c0ee9b-6c8e-4667-823b-01cdbf709161",
+    "pk": "cc190b64-fc54-4ae6-8907-9866df928d6d",
     "fields": {
         "name": "User group",
         "public": false,
@@ -3909,19 +3906,19 @@
 },
 {
     "model": "ponos.farm",
-    "pk": "0464874a-12cd-4bb5-a06f-37a872a82e5a",
+    "pk": "dd6f9265-24cf-4773-9e61-a42853278337",
     "fields": {
         "name": "Wheat farm",
-        "seed": "752dbcf9ba697d6affdd82339c81ca2db28f9b046961a317e0c509561bbc3ad7"
+        "seed": "9deb13000bdfc3a10d044b7e03b0c45f6d82f2824159198e9f89177c7e499684"
     }
 },
 {
     "model": "training.dataset",
-    "pk": "2d515087-c048-42a1-a21a-5c1ba589f455",
+    "pk": "b9d67974-4bb9-47f7-b1e8-62577fe2c831",
     "fields": {
         "created": "2020-02-02T01:23:45.678Z",
         "updated": "2020-02-02T01:23:45.678Z",
-        "corpus": "35d72d0a-7d7a-4165-ad65-a863725a470f",
+        "corpus": "206d6f86-a96c-4fd7-a097-0e5fa82de5d3",
         "creator": 2,
         "task": null,
         "name": "First Dataset",
@@ -3931,11 +3928,11 @@
 },
 {
     "model": "training.dataset",
-    "pk": "3a350d60-ce8d-4e26-a764-92b1ff02b3f8",
+    "pk": "f0391be7-aca4-4c28-adca-756822a79193",
     "fields": {
         "created": "2020-02-02T01:23:45.678Z",
         "updated": "2020-02-02T01:23:45.678Z",
-        "corpus": "35d72d0a-7d7a-4165-ad65-a863725a470f",
+        "corpus": "206d6f86-a96c-4fd7-a097-0e5fa82de5d3",
         "creator": 2,
         "task": null,
         "name": "Second Dataset",
@@ -3945,50 +3942,50 @@
 },
 {
     "model": "training.datasetset",
-    "pk": "04b3fdac-fd31-48b7-8d39-cfe68ebbe464",
+    "pk": "0117927b-cf13-4352-9e57-2f32697b4e6e",
     "fields": {
-        "name": "training",
-        "dataset": "2d515087-c048-42a1-a21a-5c1ba589f455"
+        "name": "test",
+        "dataset": "f0391be7-aca4-4c28-adca-756822a79193"
     }
 },
 {
     "model": "training.datasetset",
-    "pk": "35188db8-ac84-4edf-8f85-b747da5d20ab",
+    "pk": "4dc67765-b447-49c3-8cc9-8171bdfaaecb",
     "fields": {
-        "name": "test",
-        "dataset": "2d515087-c048-42a1-a21a-5c1ba589f455"
+        "name": "validation",
+        "dataset": "f0391be7-aca4-4c28-adca-756822a79193"
     }
 },
 {
     "model": "training.datasetset",
-    "pk": "70e0b644-45cc-4fa7-8290-f9a56801d664",
+    "pk": "6d44b8d1-a821-4bf3-a0a2-bafcc3503ffd",
     "fields": {
-        "name": "validation",
-        "dataset": "2d515087-c048-42a1-a21a-5c1ba589f455"
+        "name": "training",
+        "dataset": "f0391be7-aca4-4c28-adca-756822a79193"
     }
 },
 {
     "model": "training.datasetset",
-    "pk": "8a800950-7647-4001-8a19-fc2175061a24",
+    "pk": "7ea0c470-a45f-4365-8d25-d723143d8208",
     "fields": {
         "name": "training",
-        "dataset": "3a350d60-ce8d-4e26-a764-92b1ff02b3f8"
+        "dataset": "b9d67974-4bb9-47f7-b1e8-62577fe2c831"
     }
 },
 {
     "model": "training.datasetset",
-    "pk": "8c412165-7e72-4509-afc8-e4e5d13f428c",
+    "pk": "d02fcb33-bce7-4bea-a605-b97f8c26542c",
     "fields": {
-        "name": "validation",
-        "dataset": "3a350d60-ce8d-4e26-a764-92b1ff02b3f8"
+        "name": "test",
+        "dataset": "b9d67974-4bb9-47f7-b1e8-62577fe2c831"
     }
 },
 {
     "model": "training.datasetset",
-    "pk": "da8eb663-d2f0-489f-bcb5-6660386ba80b",
+    "pk": "da1c1b41-6290-4f32-8087-fdb925dc6643",
     "fields": {
-        "name": "test",
-        "dataset": "3a350d60-ce8d-4e26-a764-92b1ff02b3f8"
+        "name": "validation",
+        "dataset": "b9d67974-4bb9-47f7-b1e8-62577fe2c831"
     }
 }
 ]
diff --git a/arkindex/documents/tests/test_retrieve_elements.py b/arkindex/documents/tests/test_retrieve_elements.py
index 5ad132151a6f9b6fb2f3467830cfe34dac8ef9d7..6556490cbfb08607a889e990098befe59c86a947 100644
--- a/arkindex/documents/tests/test_retrieve_elements.py
+++ b/arkindex/documents/tests/test_retrieve_elements.py
@@ -155,7 +155,6 @@ class TestRetrieveElements(FixtureAPITestCase):
         process = Process.objects.create(
             mode=ProcessMode.Workers,
             creator=self.user,
-            generate_thumbnails=True,
             farm=Farm.objects.first(),
             corpus=self.corpus
         )
diff --git a/arkindex/process/builder.py b/arkindex/process/builder.py
index 6a122eeb075bcd2610ec38f5bcfb1388c79b730b..74619b170ed571970446e106b51d35595f3052be 100644
--- a/arkindex/process/builder.py
+++ b/arkindex/process/builder.py
@@ -62,24 +62,6 @@ class ProcessBuilder(object):
             for parent_slug in parent_slugs
         ) + 1
 
-    def _add_thumbnails(self, import_task_slug: str) -> None:
-        """
-        Automatically adds a thumbnail generation task at the end of each distributed chunk
-        If a specific parent slug is provided, attach the thumbnails generation task to it.
-        """
-        if not self.process.generate_thumbnails:
-            return
-
-        chunks = self._get_elements_json_chunks()
-        for index, chunk in enumerate(chunks, start=1):
-            slug = "thumbnails"
-            if len(chunks) > 1:
-                slug += f"_{index}"
-            elements_path = shlex.quote(path.join("/data", import_task_slug, chunk))
-            command = f"python3 -m arkindex_tasks.generate_thumbnails {elements_path}"
-            self._build_task(command=command, slug=slug, env=self.base_env)
-            self.tasks_parents[slug].append(import_task_slug)
-
     def _build_task(
         self,
         command,
@@ -204,8 +186,6 @@ class ProcessBuilder(object):
     def validate_dataset(self) -> None:
         self.validate_gpu_requirement()
         self.validate_archived()
-        if self.process.generate_thumbnails:
-            raise ValidationError("Thumbnails generation is incompatible with dataset mode processes.")
 
     def validate(self) -> None:
         """
@@ -275,8 +255,6 @@ class ProcessBuilder(object):
             slug=import_task_slug,
             env=self.base_env,
         )
-        # Add thumbnails
-        self._add_thumbnails(import_task_slug=import_task_slug)
 
         # Distribute worker run tasks
         worker_runs = list(self.process.worker_runs.all())
diff --git a/arkindex/process/migrations/0033_remove_process_generate_thumbnails.py b/arkindex/process/migrations/0033_remove_process_generate_thumbnails.py
new file mode 100644
index 0000000000000000000000000000000000000000..02a0afd653a0fc76b1a9454f2b349ba18b2cc79c
--- /dev/null
+++ b/arkindex/process/migrations/0033_remove_process_generate_thumbnails.py
@@ -0,0 +1,17 @@
+# Generated by Django 4.1.7 on 2024-03-27 16:38
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("process", "0032_processdatasetset_model"),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name="process",
+            name="generate_thumbnails",
+        ),
+    ]
diff --git a/arkindex/process/models.py b/arkindex/process/models.py
index ba269d422b4b8fccdabd9242b006139ddf561a01..94d041202912e84b7f43ced2a9b347311fd3936d 100644
--- a/arkindex/process/models.py
+++ b/arkindex/process/models.py
@@ -135,9 +135,6 @@ class Process(IndexableModel):
     # Used to include sub-elements of the actual query in Workers processes
     load_children = models.BooleanField(default=False)
 
-    # Whether or not to add a thumbnail generation task
-    generate_thumbnails = models.BooleanField(default=False)
-
     chunks = models.PositiveIntegerField(
         default=1,
         validators=[
diff --git a/arkindex/process/serializers/imports.py b/arkindex/process/serializers/imports.py
index 349781accf6c32d2fb65593ec193a9f240dddb99..830e01541b8814e63ec65e34fe137caa5280c8e9 100644
--- a/arkindex/process/serializers/imports.py
+++ b/arkindex/process/serializers/imports.py
@@ -258,9 +258,6 @@ class FilesProcessSerializer(serializers.ModelSerializer):
     # Automatically set the creator on the process
     creator = serializers.HiddenField(default=serializers.CurrentUserDefault())
 
-    # Always start the process with thumbnail generation enabled
-    generate_thumbnails = serializers.HiddenField(default=True)
-
     default_error_messages = {
         "mode_not_allowed": "This mode is not allowed when importing from files",
         "files_required": "At least one file is required to start an import process",
@@ -287,7 +284,6 @@ class FilesProcessSerializer(serializers.ModelSerializer):
             "element_type",
             "farm_id",
             "creator",
-            "generate_thumbnails",
         )
 
     def validate_mode(self, mode):
@@ -389,7 +385,6 @@ class StartProcessSerializer(serializers.Serializer):
         validators=[MaxValueValidator(lambda: settings.MAX_CHUNKS)],
         default=1,
     )
-    thumbnails = serializers.BooleanField(default=False, source="generate_thumbnails")
     farm = serializers.PrimaryKeyRelatedField(queryset=Farm.objects.all(), default=None, allow_null=True)
     use_cache = serializers.BooleanField(default=False)
     use_gpu = serializers.BooleanField(default=False, allow_null=True)
@@ -421,8 +416,6 @@ class StartProcessSerializer(serializers.Serializer):
             elif not any(ds.dataset.corpus_id == self.instance.corpus.id for ds in self.instance.sets.all()):
                 errors["non_field_errors"].append("At least one of the process sets must be from the same corpus as the process.")
 
-            if validated_data.get("generate_thumbnails"):
-                errors["thumbnails"].append("Thumbnails generation is not supported on Dataset processes.")
             if validated_data.get("worker_activity"):
                 errors["worker_activity"].append("Worker activities are not supported on Dataset processes.")
             if validated_data.get("use_cache"):
@@ -481,14 +474,7 @@ class StartProcessSerializer(serializers.Serializer):
                 )
 
         else:
-            if validated_data.get("worker_activity"):
-                errors["worker_activity"].append("The process must have workers attached to handle their activity.")
-            if validated_data.get("use_cache"):
-                errors["use_cache"].append("The process must have workers attached to use cached results.")
-            if validated_data.get("use_gpu"):
-                errors["use_gpu"].append("The process must have workers attached to use GPUs.")
-            if not validated_data.get("generate_thumbnails"):
-                errors["__all__"].append("The process must either use thumbnail generation or have worker runs.")
+            errors["__all__"].append("The process must have worker runs to be started.")
 
         if errors:
             raise ValidationError(errors)
diff --git a/arkindex/process/tests/test_create_process.py b/arkindex/process/tests/test_create_process.py
index e64131810d51a5e8375be7b8fad3ec9c482d85ff..ef88844880e576939715cf2cf436feac8c5bb46b 100644
--- a/arkindex/process/tests/test_create_process.py
+++ b/arkindex/process/tests/test_create_process.py
@@ -117,10 +117,14 @@ class TestCreateProcess(FixtureAPITestCase):
         })
 
         # The process needs to be started to produce a workflow
+        process.worker_runs.create(
+            version=self.version_1
+        )
+
         response = self.client.post(
             reverse("api:process-start", kwargs={"pk": str(process.id)}),
             # The process needs a worker run or thumbnails generation to start
-            {"thumbnails": "true"}
+            {}
         )
         self.assertEqual(response.status_code, status.HTTP_201_CREATED)
         process.refresh_from_db()
@@ -487,10 +491,13 @@ class TestCreateProcess(FixtureAPITestCase):
         self.assertEqual(process.elements.get(), page)
 
         # The process needs to be started to produce a workflow
+        process.worker_runs.create(
+            version=self.version_1
+        )
+
         response = self.client.post(
             reverse("api:process-start", kwargs={"pk": str(process.id)}),
-            # The process needs a worker run or thumbnails generation to start
-            {"thumbnails": "true"}
+            {}
         )
         self.assertEqual(response.status_code, status.HTTP_201_CREATED)
         process.refresh_from_db()
@@ -533,46 +540,6 @@ class TestCreateProcess(FixtureAPITestCase):
         process = Process.objects.get(id=data["id"])
         self.assertEqual(process.name, "blah")
 
-    def test_thumbnails_generation_only(self):
-        """
-        Generating thumbnails without any worker must generate a process task
-        and a thumbnails task, when the process is started
-        """
-        self.client.force_login(self.user)
-        corpus_type = self.corpus.types.first()
-        response = self.client.post(
-            reverse("api:corpus-process"),
-            {
-                "corpus": str(self.corpus.id),
-                "element_type": corpus_type.slug,
-            },
-            format="json"
-        )
-        self.assertEqual(response.status_code, status.HTTP_201_CREATED)
-        data = response.json()
-        process = Process.objects.get(id=data["id"])
-        self.assertFalse(process.tasks.exists())
-
-        response = self.client.post(
-            reverse("api:process-start", kwargs={"pk": str(process.id)}),
-            {
-                "chunks": 3,
-                "thumbnails": True,
-            }
-        )
-        self.assertEqual(response.status_code, status.HTTP_201_CREATED)
-        process.refresh_from_db()
-
-        self.assertEqual(process.tasks.count(), 4)
-        init_task = process.tasks.get(slug="initialisation")
-        self.assertEqual(init_task.command, f"python -m arkindex_tasks.init_elements {process.id} --chunks-number 3")
-
-        for i in range(1, 4):
-            self.assertEqual(
-                process.tasks.get(slug=f"thumbnails_{i}").command,
-                f"python3 -m arkindex_tasks.generate_thumbnails /data/initialisation/elements_chunk_{i}.json"
-            )
-
     @override_settings(
         ARKINDEX_TASKS_IMAGE="registry.teklia.com/tasks",
         PONOS_DEFAULT_ENV={}
diff --git a/arkindex/process/tests/test_processes.py b/arkindex/process/tests/test_processes.py
index 84d6dcb9253147c24bcd704bde68579ee5e4b458..31d7de782d22fda2b928677b48d2f013b07d6727 100644
--- a/arkindex/process/tests/test_processes.py
+++ b/arkindex/process/tests/test_processes.py
@@ -2168,7 +2168,7 @@ class TestProcesses(FixtureAPITestCase):
 
         self.assertEqual(
             response.json(),
-            {"__all__": ["The process must either use thumbnail generation or have worker runs."]},
+            {"__all__": ["The process must have worker runs to be started."]},
         )
 
     def test_start_process_unavailable_worker_version(self):
@@ -2355,7 +2355,6 @@ class TestProcesses(FixtureAPITestCase):
             response = self.client.post(
                 reverse("api:process-start", kwargs={"pk": str(process2.id)}),
                 {
-                    "thumbnails": True,
                     "use_cache": True,
                     "worker_activity": True,
                 }
@@ -2363,7 +2362,6 @@ class TestProcesses(FixtureAPITestCase):
             self.assertEqual(response.status_code, status.HTTP_400_BAD_REQUEST)
 
         self.assertDictEqual(response.json(), {
-            "thumbnails": ["Thumbnails generation is not supported on Dataset processes."],
             "use_cache": ["Caching is not supported on Dataset processes."],
             "worker_activity": ["Worker activities are not supported on Dataset processes."],
         })
@@ -2509,7 +2507,6 @@ class TestProcesses(FixtureAPITestCase):
             ({"chunks": 0}, {"chunks": ["Ensure this value is greater than or equal to 1."]}),
             ({"chunks": 20}, {"chunks": ["Ensure this value is less than or equal to 10."]}),
             ({"chunks": "max"}, {"chunks": ["A valid integer is required."]}),
-            ({"thumbnails": "gloubiboulga"}, {"thumbnails": ["Must be a valid boolean."]})
         ]
         for (params, check) in wrong_params_checks:
             with self.subTest(**params), self.assertNumQueries(5):
@@ -2539,7 +2536,7 @@ class TestProcesses(FixtureAPITestCase):
 
     def test_start_process_workers_parameters(self):
         """
-        It should be possible to pass chunks and thumbnails parameters when starting a workers process
+        It should be possible to pass chunks parameters when starting a workers process
         """
         process = self.corpus.processes.create(creator=self.user, mode=ProcessMode.Workers)
         # Add a worker run to this process
@@ -2548,7 +2545,7 @@ class TestProcesses(FixtureAPITestCase):
         self.client.force_login(self.user)
         response = self.client.post(
             reverse("api:process-start", kwargs={"pk": str(process.id)}),
-            {"chunks": 3, "thumbnails": "true"}
+            {"chunks": 3}
         )
         self.assertEqual(response.status_code, status.HTTP_201_CREATED)
         process.refresh_from_db()
@@ -2558,9 +2555,6 @@ class TestProcesses(FixtureAPITestCase):
             f"{run.task_slug}_1",
             f"{run.task_slug}_2",
             f"{run.task_slug}_3",
-            "thumbnails_1",
-            "thumbnails_2",
-            "thumbnails_3"
         ])
 
     def test_start_process_dataset_chunks(self):
@@ -2608,10 +2602,7 @@ class TestProcesses(FixtureAPITestCase):
             )
         self.assertEqual(response.status_code, status.HTTP_400_BAD_REQUEST)
         self.assertDictEqual(response.json(), {
-            "__all__": ["The process must either use thumbnail generation or have worker runs."],
-            "use_cache": ["The process must have workers attached to use cached results."],
-            "worker_activity": ["The process must have workers attached to handle their activity."],
-            "use_gpu": ["The process must have workers attached to use GPUs."],
+            "__all__": ["The process must have worker runs to be started."]
         })
         process.refresh_from_db()
         self.assertFalse(process.use_cache)
diff --git a/arkindex/sql_validation/process_elements_filter_ml_class.sql b/arkindex/sql_validation/process_elements_filter_ml_class.sql
index b8169c5012492220d26060dd17b9274dc2a2939b..773198cab05df817c099f57ffb9ba01b3127611d 100644
--- a/arkindex/sql_validation/process_elements_filter_ml_class.sql
+++ b/arkindex/sql_validation/process_elements_filter_ml_class.sql
@@ -29,7 +29,6 @@ SELECT "process_process"."id",
        "process_process"."name_contains",
        "process_process"."ml_class_id",
        "process_process"."load_children",
-       "process_process"."generate_thumbnails",
        "process_process"."chunks",
        "process_process"."use_cache",
        "process_process"."use_gpu",
diff --git a/arkindex/sql_validation/process_elements_filter_type.sql b/arkindex/sql_validation/process_elements_filter_type.sql
index a0413952bd0533ffa389574029f32f3a3329274c..6710d5e0f85a9237dae975069b430d4d7d7e96fc 100644
--- a/arkindex/sql_validation/process_elements_filter_type.sql
+++ b/arkindex/sql_validation/process_elements_filter_type.sql
@@ -29,7 +29,6 @@ SELECT "process_process"."id",
        "process_process"."name_contains",
        "process_process"."ml_class_id",
        "process_process"."load_children",
-       "process_process"."generate_thumbnails",
        "process_process"."chunks",
        "process_process"."use_cache",
        "process_process"."use_gpu",
diff --git a/arkindex/sql_validation/process_elements_top_level.sql b/arkindex/sql_validation/process_elements_top_level.sql
index 68df166d1ab7c0c419d43b281a6c55f411521ae6..3087532fd0d1af1d4ba9ccc640a4c043230453ea 100644
--- a/arkindex/sql_validation/process_elements_top_level.sql
+++ b/arkindex/sql_validation/process_elements_top_level.sql
@@ -29,7 +29,6 @@ SELECT "process_process"."id",
        "process_process"."name_contains",
        "process_process"."ml_class_id",
        "process_process"."load_children",
-       "process_process"."generate_thumbnails",
        "process_process"."chunks",
        "process_process"."use_cache",
        "process_process"."use_gpu",
diff --git a/arkindex/sql_validation/process_elements_with_image.sql b/arkindex/sql_validation/process_elements_with_image.sql
index ec4b65bf479428be8287aed7263fd7471ba8e6fc..9d89dc7c0ec86556af2927dece2c53a23268d167 100644
--- a/arkindex/sql_validation/process_elements_with_image.sql
+++ b/arkindex/sql_validation/process_elements_with_image.sql
@@ -29,7 +29,6 @@ SELECT "process_process"."id",
        "process_process"."name_contains",
        "process_process"."ml_class_id",
        "process_process"."load_children",
-       "process_process"."generate_thumbnails",
        "process_process"."chunks",
        "process_process"."use_cache",
        "process_process"."use_gpu",