Duplicate index entries

I have used the ‘Find Duplicates’ tool and it shows that I have duplicate Index entries. If I choose to ‘Remove all duplicates automatically’, does this just remove the index number or does the whole book disappear?

If you remove duplicates, it actually removes the books.

BTW: duplicate Index numbers is not really a problem if you do not use the Index numbers for something.

Thanks for the reply. I was just doing some tidying and it wasn’t clear. I’ll leave it as it is!