You don’t lose anything. All your custom posts, taxonomies, terms and their relationships are still in the database. Without having those registered, however, the data can’t be accessed, as in the WordPress edit page or custom queries and the like.
You don’t lose anything. All your custom posts, taxonomies, terms and their relationships are still in the database. Without having those registered, however, the data can’t be accessed, as in the WordPress edit page or custom queries and the like.