Retry adds an extra init_element task

Refs https://redmine.teklia.com/issues/8828?issue_count=57&issue_position=6&next_issue_id=8708&prev_issue_id=6435#note-3

Example : https://ee.preprod.arkindex.teklia.com/process/dad70096-7df8-4048-9f9b-830cd10218f5/1

Simply retrying a worker process adds an extra init-elements task, thus breaking all socface retries.

We need a hotfix for that