How to change author after combining with incorrect author?

Hi,
I combined The Pack Mascot by Freda Collins with another work called "Pack Mascot, The" but that work had a different Freda Collins (which is only used for that book) (https://www.librarything.com/author/fredacollins) and it used the incorrect author for the work.
How can I change the author to the correct Freda Collins, who is the author of The Good Turn Hunters (https://www.librarything.com/author/collinsfreda).
Thanks

I've just combined the two Freda Collins together and it looks like it's showing correctly now.

>2 Aquila: Thanks!