It’s actually a naming restriction from WordPress. Within your site, you can’t have names for Custom Post Types that conflict with either existing WordPress objects (user, post, page, media, etc) or existing Post Types. Within each post type, you can have duplicate field names across post types, because key/value pair in Post Meta is actually …
This section details all the options available on the Advanced Options tab of the Edit Custom Post Type screen in the Pods Admin.
If your item (taxonomy or CPT) can stand alone by itself as a page of detail, it should be a CPT. If it can only exist as a group of things, it’s a Custom Taxonomy. For instance, I don’t feel Authors is a Custom Taxonomy of Books. They’re both Custom Post Types and related to …
Existing Post Types
Extending Other Plugin Post Types