[Anwered] An edition is incorrectly listed as a seperate book

[Sophie]

Hi, I'm a relatively new librarian and I can't figure this one out.

This German edition of Isaac and the Egg is listed as a separate book, where it should be another edition to Isaac and the Egg.

The faulty one:
https://www.goodreads.com/book/show/1...

The good one:
https://www.goodreads.com/book/show/5...

How do I move a book from being, well, a book, to being an edition? I've checked the manual but I can't find it for the life of me, and I don't want to improvise, especially on such a relatively popular book. Can someone help me out? (or do it and tell me how they did it?)

Thanks so much in advance!

[Renske]

The editions need to be combined, see https://help.goodreads.com/s/article/...

[Sophie]

Renske wrote: "The editions need to be combined, see https://help.goodreads.com/s/article/..."

Oh right, I must've overlooked somehow. Thanks so much!