Notice: session_start(): Ignoring session_start() because a session is already active (started from /var/www/webhost/paykara.co/kurt.paykara.co/admin/add_new_items_sub_group.php on line 7) in /var/www/webhost/paykara.co/kurt.paykara.co/admin/includes/header.php on line 19
After adding the new sub-group, update the page.