Apologies if this multiposts... Having issues with Quick Reply.
Tried to download a fic and got the Change Story URL prompt for "is already in your library with a different source URL".
The problem:
https://archiveofourown.org/works/17257112
https://archiveofourown.org/works/45170194
These are actually 2 separate fic by the same author with titles that are just slightly different: "how the old grace goes" vs "care not how the old grace goes".
It is not a terribly big deal for me in this case because I don't care about keeping the earlier one I had downloaded so I will just delete it and download the new one, but I am unable use the plugin to download/keep both fic in my Calibre library.