In case there is an OL conflict error in DI update handler - request new version of entity to update and retry the update.
There should be added a retry mechanism for each entity in mod-inventory. This mechanism should try to re-create/re-update entity in mod-inventory-storage if there is an error regarding OL.
Handlers for Instance:
Handlers for Holdings:
Handlers for Items:
There should be added tests for that mechanism.
Additionally, try to test this mechanism for OL locally (if there is an opportunity).