Per https://www.mediawiki.org/w/index.php?title=Topic:Uaepkg08qfdmgx4y&action=history
When you look at this diff https://commons.wikimedia.org/w/index.php?title=File:Max-Braun-Medaille.jpg&diff=294690253&oldid=294688617&diffmode=source , there's a redundant GFDL template being removed.
You just can't see any change in the visual diff version .
The expectation would be that the template is there, displayed in red/marked as removed.