Discuz! Database Error

(1366) Incorrect integer value: '' for column `ktadmin_ultraxutf8`.`forum_thread`.`maxposition` at row 1
UPDATE forum_thread SET `maxposition`='' WHERE `tid`='213198'

PHP Debug

No.FileLineCode
1forum.php67require(%s)
2source/module/forum/forum_viewthread.php395table_forum_thread->update()
3source/class/table/table_forum_thread.php849discuz_database::update()
4source/class/discuz/discuz_database.php78discuz_database::query()
5source/class/discuz/discuz_database.php142db_driver_mysqli->query()
6source/class/db/db_driver_mysqli.php148db_driver_mysqli->halt()
7source/class/db/db_driver_mysqli.php223break()
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