Discuz! info: MySQL Query Error

Time: 2009-11-7 5:25pm
Script: /index.php

SQL: UPDATE cdb_crons SET lastrun='1257585943', nextrun='1257609600' WHERE cronid='1'
Error: User 'student-forum_forum' has exceeded the 'max_questions' resource (current value: 1)
Errno.: 1226

Similar error report has beed dispatched to administrator before.