Discuz! Database Error

(1366) Incorrect integer value: '' for column `id2450068_mysql`.`forum_thread`.`maxposition` at row 1
UPDATE forum_thread SET `maxposition`='' WHERE `tid`='80341'

PHP Debug

No.FileLineCode
1forum.php72require(%s)
2source/module/forum/forum_viewthread.php394table_forum_thread->update(%f, Array)
3source/class/table/table_forum_thread.php845discuz_database::update(%s, Array, %s, false, false)
4source/class/discuz/discuz_database.php78discuz_database::query(%s, %s)
5source/class/discuz/discuz_database.php137db_driver_mysqli->query(%s, false, false)
6source/class/db/db_driver_mysqli.php147db_driver_mysqli->halt(%s, %d, %s)
7source/class/db/db_driver_mysqli.php222break()
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