There are a number of reserved post type names in WordPress that you can’t overwrite. They can be found on the codex:
https://codex.wordpress.org/Function_Reference/register_post_type
‘post’ is one of them.
There are a number of reserved post type names in WordPress that you can’t overwrite. They can be found on the codex:
https://codex.wordpress.org/Function_Reference/register_post_type
‘post’ is one of them.