Copy usermeta value where ID matches in the same table
use this code, it may help you $users = get_users($args); if($users) { foreach($users as $user) { $user_id = $user->ID; $shipping_first_name = get_user_meta($user_id, ‘shipping_first_name’, true); if($shipping_first_name) { update_user_meta( $user_id, ‘first_name’, $shipping_first_name); } } } for $args – refer link https://codex.wordpress.org/Function_Reference/get_users