please help delete duplicate books

[Diane]

Hi! I need help deleting duplicate editions of my book. I created two editions (ebook and paperback) prepublication to try to spread the word, but then the cover art changed. I now have a correct edition with the proper cover (the Kindle edition), but I cannot get rid of the other editions. They are already combined, but I'd like the duplicates with the old cover to go away, as the book was never released with that cover.

[Emy]

Were the first covers ever on any review / advance release copies?