[BUGFIX] Prevent error message for correct imports of sys_file_metadata

If sys_file_metadata records are updated on import, a wrong error message
is logged.

Resolves: #58826
Releases: 6.3, 6.2
Change-Id: I023306a69da9c725d52d076d196bf22178ff1f62
Reviewed-on: https://review.typo3.org/30987
Reviewed-by: Marc Bastian Heinrichs
Tested-by: Marc Bastian Heinrichs