I have a "author" custom field with the names of author. I want to add some new features to the site so I decided that custom taxonomies will be the best solution. So what I need to do is to get the value of the custom field and pass it to the custom taxonomy called artist. Sure I can do this manually but it is more than 1000 posts so it would be hell.
I guess the solution will be connected with wp_set_object_terms(); function, but nothing I tried worked.
Thank you for any answer.