Discuz! info: MySQL Query Error

Time: 2015-8-31 2:44pm
Script: /discuz/viewthread.php

SQL: SELECT f.* , t.* FROM cdb_forums f, cdb_threads t WHERE t.tid='486511' AND f.fid=t.fid LIMIT 1
Error: Table '.\discuz\cdb_threads' is marked as crashed and should be repaired
Errno.: 145

Similar error report has beed dispatched to administrator before.