delete authors

[Katharina]

I accidentally entered the authors with their surnames first. When I try to delete them, I get error messages. So, I'm suspecting that I need the help of a librarian for that. I already entered the author names the right way round. Only the names starting with the surname need to be deleted.

Here's the link to the book:
https://www.goodreads.com/book/show/2...

Thank you in advance.
Katharina

[Katharina]

Thank you so much. You librarians are my secret heroes. :D