Commons files with type "page" in categorylinks table
The Commons database contains categorylinks for files with type "page". But files should have type "file".
I think this error may exist in other databases too. Bug 29787 was about a category in English Wikipedia, but that was fixed by null edits. Now null edits does not seem to fix the errors at Commons.
Bug 29787 has an example of problems caused by this bug.
attachment ignored as obsolete