Stale read on CreateElements

CreateElements might cause an HTTP 404 when the parent element (the id in the URL) is not yet visible in the replica.

Example from a Transkribus import:

[INFO] Creating page 6061339
[INFO] Importing transcript 0003_6061339.xml to page cf2d187b-3798-4fca-a4be-069a26015bb0
[ERROR] Failed importing transcript 164781/CE601S095-1877_duplicated/0003_6061339.xml to page cf2d187b-3798-4fca-a4be-069a26015bb0: 404 - {'detail': 'Not found.'}