Combining and separating books > Likes and Comments

When I entered my book, it didn't like the ASIN, so I used the ISBN, book cover, release date, etc. Now that ARC reviews started coming in, there was that book and a strange book with my title but no cover. I combined them and my book reviews disappeared to o reviews. so, I went to separate them and it said I don't have permission. Please advise what you need from me to fix this.

The ISBN was moved to the e-book. Just add the cover. They are the same book obviously so they shouldn't be separated.