Consider https://commons.wikimedia.org/wiki/Special:FileDuplicateSearch/File:Fl._84,_Nr._117-118.JPG ( Where File:Fl._84,_Nr._117-118.JPG is a redirect to File:Grabmal auf Melaten.JPG, and there are no duplicates of the file present)
Page says there are no duplicates of the file, and then lists a file that's named something other then the one being looked for, which makes it look like a duplicate is being listed (Even though it really isn't since the file being looked up is a redirect).
Perhaps redirects should be listed on File duplicate search page. After all its another method of addressing the same file. Not really sure.
Version: 1.23.0
Severity: minor