Deleting an edition without ISBN

[Aradhya]

This edition of As i crossed a bridge of dreams by lady sarashina https://www.goodreads.com/book/show/2... does not have an isbn, or the asin number. it is actually an alternate cover edition of https://www.goodreads.com/book/show/1... with the same isbn number but isn't registered as one.
i added a new alternate cover edition https://www.goodreads.com/book/show/8... with all the correct details of the book but i cannot delete the former edition as it has some reviews already.
thanks in advance!

[David]

Done.