Sometimes I'll mark a book to read.
And maybe a year later I'll buy the book and start reading it and mark it as currently reading. And finish it, and mark it as Read.

However, sometimes the edition I marked as To Read was not the one I later marked as reading and Read. This makes it look like I still want to read the book.

I think it would be handy to have a filter to show books where there are editions that you have a status against more than one, to help users do cleanup for unintentional things like the above.

Variant: maybe optionally allow for checking more than one status for the same edition? Such cases would be less about cleanup and more about intentional rereads, or re-attempts for a DNF plus a Currently Reading, for example.