I've these two CPT: Publications and Books.
The custom rewrite slug for Publications
are just /publications/
I want the Books CPTs rewrite slug to be /publications/books/
But I do that and I get an 404 error when navigating to site.com/publications/books/wordpress-is-great
Most certainly be cause it is the publications rewrite rules which "step" in and not books but I can't seem to figure out how to make this work and "combining" parts of the rewrite slug for Publications.