How do I have now a duplicated user entry if this is not allowed (and I cannot replicate it)?
Yes, WordPress checks for duplicate emails internally, but not duplicate usernames To test this I ran this several times via wp shell: wp_create_user( ‘test’, ‘password’, ‘[email protected]’ ); The result on the second attempt was: => class WP_Error#1962 (2) { public $errors => array(1) { ‘existing_user_email’ => array(1) { [0] => string(42) “Sorry, that email address … Read more