Проблема с обновлением до 100 версии УКМ-4 : УКМ-4

DROP PROCEDURE IF EXISTS ukmserver.wbn_clearsessions;
CREATE PROCEDURE ukmserver.`wbn_clearsessions`()
    MODIFIES SQL DATA
    DETERMINISTIC
    COMMENT 'Удаляет из системы уведомлений все неактивные сессии'
BEGIN
DECLARE nw DATETIME;
DECLARE is_end INT DEFAULT 0;
DECLARE _id VARCHAR(50);
DECLARE _guid VARCHAR(50);
DECLARE _page VARCHAR(100);


DECLARE curs CURSOR FOR SELECT wbn_event.id
                        FROM wbn_event
                        left outer join wbn_session on wbn_event.guid = wbn_session.guid AND
                                                      wbn_event.page = wbn_session.page
                        where wbn_session.guid is null or IFNULL(wbn_session.cur_state,0) <> 1;

DECLARE cursess CURSOR FOR SELECT guid, page
                       from  wbn_session WHERE last_request < nw;


DECLARE CONTINUE HANDLER FOR NOT FOUND SET is_end = 1;

OPEN curs;
wet : LOOP
      FETCH curs INTO _id;
      IF is_end THEN
         LEAVE wet;
      END IF;

      delete from wbn_event where id = _id;
END LOOP wet;

CLOSE curs;

SET nw = DATE_SUB(NOW(),INTERVAL 3 DAY);

SET is_end = 0;

OPEN cursess;
wetsess : LOOP
      FETCH cursess INTO _guid,_page;
      IF is_end THEN
         LEAVE wetsess;
      END IF;

      delete from wbn_session where guid = _guid and page = _page;
END LOOP wetsess;

CLOSE cursess;

END;