ALTER TABLE `#__sr_feedbacks`
  MODIFY COLUMN `reservation_id` INT(10) UNSIGNED NOT NULL DEFAULT '0';

ALTER TABLE `#__sr_feedbacks`
  ADD COLUMN `item_id` INT(10) UNSIGNED NOT NULL DEFAULT '0'
  AFTER `scope`;

ALTER TABLE `#__sr_feedbacks`
  ADD COLUMN `customer_name` VARCHAR(255) NULL DEFAULT NULL
  AFTER `item_id`;

ALTER TABLE `#__sr_feedbacks`
  ADD COLUMN `customer_country_id` INT(10) UNSIGNED NOT NULL DEFAULT '0'
  AFTER `customer_name`;