- Log into https://core-platform.ci.folio.org/ where optimistic locking (fail on conflict) has been enabled.
- Open an item record for edit
- Change the item material type
- Save the item record
- (If it succeeds repeat Open, Change, and Save one time.)
Optimistic locking conflict detection modal with this error message:
The front-end doesn't send the _version property when submitting the PUT request to the back-end.
Updating instance and updating holding work and are not affected because the frontend sends the instance _version and holdings _version to the back-end when submitting the PUT request.