Discuz! Database Error

(1449) The user specified as a definer ('root'@'%') does not exist
UPDATE forum_thread SET `relatebytag`='1524263169 542419,538052,537893,530781,479550,438368,282167,228339' WHERE `tid`='544041'

PHP Debug

No.FileLineCode
1forum.php71require(%s)
2source/module/forum/forum_viewthread.php686getrelateitem(Array, %s, %s, %s)
3source/module/forum/forum_viewthread.php1539table_forum_thread->update(%f, Array)
4source/class/table/table_forum_thread.php845discuz_database::update(%s, Array, %s, false, false)
5source/class/discuz/discuz_database.php78discuz_database::query(%s, %s)
6source/class/discuz/discuz_database.php137db_driver_mysqli->query(%s, false, false)
7source/class/db/db_driver_mysqli.php147db_driver_mysqli->halt(%s, %d, %s)
8source/class/db/db_driver_mysqli.php222break()
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