ISBN already assigned to another book?

[Hannah]

I just bought this book today and wanted to add it to my account. I copied the ISBN-13 directly out of the book's front matter and found that it was already assigned to another book (9781592880256). For now, I have just used the ISBN-10 for my new record, but when I googled the 13, I found, among other sources, that Amazon confirms that the ISBN-13 in question does in fact belong to this new book, not the one already in the GoodReads system. How do I fix this?

[Lobstergirl]

A user had added that ISBN incorrectly to a different (but similarly named) book. I merged that one into another edition. Go ahead and edit your record with the ISBN 9781592880256 - should work now.

[Hannah]

ahh, I thought there were too many of that other one. Thanks so much!