re reasons why books that should combine won't combine

[Lisa]

Along with author names not being identical and identical ISBNs, I just noticed a third reason why some books won't combine when we try to combine them:

I found an instance where someone put a web site address in the URL field and until I deleted that information, the editions wouldn't combine. Goodreads kept giving me error messages with the URL field highlighted.

Just fyi.

[rivka, Former Moderator]

Another: the new publication date fields don't like there being a month without a year, or a day without both year and month. Fixing those took care of some won't-combines for me earlier.