Добавление дополнительной графы в заказ

[Genych]

Добрый день всем!
Нужна помощь с добавлением дополнительной графы в заказ и регистрацию аккаунта магазина версии 2.3. По этой ссылке сделал все как написано, конечно же учитывая свою версию. В принципе все вышло удачно - теперь клиент не может регистрировать заказ без указания отчества, при регистрации аккаунта появляется графа "Отчество", его может менять клиент в своем личном кабинете, также при редактировании аккаунта админом. Но не получилось лишь одно: выскакивает ошибка при редактировании заказа админом 

  Показати вміст

undefined index: middlename, payment_middlename, shipping_middlename in catalog/model/checkout/order.php on line 51

Вот часть этого кода строки 51 из этого файла

  Показати вміст

$this->db->query("UPDATE `" . DB_PREFIX . "order` SET invoice_prefix = '" . $this->db->escape($data['invoice_prefix']) . "', store_id = '" . (int)$data['store_id'] . "', store_name = '" . $this->db->escape($data['store_name']) . "', store_url = '" . $this->db->escape($data['store_url']) . "', customer_id = '" . (int)$data['customer_id'] . "', customer_group_id = '" . (int)$data['customer_group_id'] . "', lastname = '" . $this->db->escape($data['lastname']) . "', firstname = '" . $this->db->escape($data['firstname']) . "', middlename = '" . $this->db->escape($data['middlename']) . "', email = '" . $this->db->escape($data['email']) . "', telephone = '" . $this->db->escape($data['telephone']) . "', fax = '" . $this->db->escape($data['fax']) . "', custom_field = '" . $this->db->escape(json_encode($data['custom_field'])) . "', payment_lastname = '" . $this->db->escape($data['payment_lastname']) . "', payment_firstname = '" . $this->db->escape($data['payment_firstname']) . "', payment_middlename = '" . $this->db->escape($data['payment_middlename']) . "', payment_company = '" . $this->db->escape($data['payment_company']) . "', payment_address_1 = '" . $this->db->escape($data['payment_address_1']) . "', payment_address_2 = '" . $this->db->escape($data['payment_address_2']) . "', payment_city = '" . $this->db->escape($data['payment_city']) . "', payment_postcode = '" . $this->db->escape($data['payment_postcode']) . "', payment_country = '" . $this->db->escape($data['payment_country']) . "', payment_country_id = '" . (int)$data['payment_country_id'] . "', payment_zone = '" . $this->db->escape($data['payment_zone']) . "', payment_zone_id = '" . (int)$data['payment_zone_id'] . "', payment_address_format = '" . $this->db->escape($data['payment_address_format']) . "', payment_custom_field = '" . $this->db->escape(json_encode($data['payment_custom_field'])) . "', payment_method = '" . $this->db->escape($data['payment_method']) . "', payment_code = '" . $this->db->escape($data['payment_code']) . "', shipping_lastname = '" . $this->db->escape($data['shipping_lastname']) . "', shipping_firstname = '" . $this->db->escape($data['shipping_firstname']) . "', shipping_middlename = '" . $this->db->escape($data['shipping_middlename']) . "', shipping_company = '" . $this->db->escape($data['shipping_company']) . "', shipping_address_1 = '" . $this->db->escape($data['shipping_address_1']) . "', shipping_address_2 = '" . $this->db->escape($data['shipping_address_2']) . "', shipping_city = '" . $this->db->escape($data['shipping_city']) . "', shipping_postcode = '" . $this->db->escape($data['shipping_postcode']) . "', shipping_country = '" . $this->db->escape($data['shipping_country']) . "', shipping_country_id = '" . (int)$data['shipping_country_id'] . "', shipping_zone = '" . $this->db->escape($data['shipping_zone']) . "', shipping_zone_id = '" . (int)$data['shipping_zone_id'] . "', shipping_address_format = '" . $this->db->escape($data['shipping_address_format']) . "', shipping_custom_field = '" . $this->db->escape(json_encode($data['shipping_custom_field'])) . "', shipping_method = '" . $this->db->escape($data['shipping_method']) . "', shipping_code = '" . $this->db->escape($data['shipping_code']) . "', comment = '" . $this->db->escape($data['comment']) . "', total = '" . (float)$data['total'] . "', affiliate_id = '" . (int)$data['affiliate_id'] . "', commission = '" . (float)$data['commission'] . "', date_modified = NOW() WHERE order_id = '" . (int)$order_id . "'");

Помогите пжл, подскажите где объявляются данные функции.
Заранее благодарен