Notice: Undefined index: group_id system/controllers/auth/actions /register.php on line 50

//Кусочек кода с register.php
 
 // убираем поля Которые НЕ относятся к выбранной пользователем группе
            //
            foreach ($ fieldsets as $ fieldset) {
                foreach ($ fieldset [ 'fields'] as $ field) {
 
                    if (empty ($ field [ 'groups_edit'])) {continue; }
                    if (in_array (0, $ field [ 'groups_edit'])) {continue; }
 
                    if (! in_array ($ user [ 'group_id'], $ field [ 'groups_edit'])) {
                        $ Form-> disableField ($ field [ 'name']);
                        unset ($ user [$ field [ 'name']])
                    }
 
                }
            } 

if (!in_array($user['group_id'], $field['groups_add'])){

if (!cmsUser::isUserInGroups($field['groups_add'], $user['groups'])){