Rewrite rule conflict with Sermon Manager

You’ll have to choose which one you want to use the book URL and which one to change. If you want to change the Mooberry Book Manager URLs or if you are unable to change the Sermon Manager URL, add this code to either a custom plugin you have made or in your child theme’s functions.php file :

add_filter( 'mbdb_book_cpt', 'mbdb_change_book_slug' );
function mbdb_change_book_slug( $args ) {
	$args['rewrite']['slug'] = 'mbdb_book';
	return $args;
}

( change the mbdb_book in the 3rd line to whatever you want to set the URL to )

Once the code is in place, you will need to reset your permalinks by going to Settings -> Permalinks and clicking the save button. You do not need to make any changes on this page. You only need to reset your permalinks once after adding this code.

• This reply was modified 6 years, 3 months ago by mooberrydreams.
• This reply was modified 6 years, 3 months ago by mooberrydreams.

How to get slugs of all registered post types: https://wordpress.stackexchange.com/questions/34410/get-list-of-all-registered-post-types-slugs

Another alternative would be to detect there’s a conflict and alert the user and let them change one or both slugs.

This would be a good thing for WP Core to do rather than put the responsibility on every plugin.