We've created this Forum Thread with some workarounds and advice to assist you in publishing you ebook.
How do I undo an ineligible eBook?
I went to add Amazon Kindle as a distribution option for my eBook. However, when asked if it was already on Amazon, in a temporary lapse of what I was clicking, I clicked "yes", thinking that my paperback was on Amazon. After doing so I got a message saying it was ineligable because my eBook was already on there. The fact is, it is my paperback, not my eBook.
How do I undo this? I can not find a way other than making a new revision. I want it like it is as italready has an ISBN.
Thanks to anyone who can help.