Discuz! info: MySQL Query Error

Time: 2018-9-26 2:48pm
Script: /Discuz/viewthread.php

SQL: SELECT t.tid, t.closed, t.dateline, t.special, t.lastpost AS lastthreadpost, f.*, ff.* , f.fid AS fid
FROM [Table]threads t
INNER JOIN [Table]forums f ON f.fid=t.fid
LEFT JOIN [Table]forumfields ff ON ff.fid=f.fid
WHERE t.tid='300748' AND t.displayorder>='0' LIMIT 1
Error: Incorrect key file for table './dkoffice_dzutf8/[Table]threads.MYI'; try to repair it
Errno.: 126

Similar error report has beed dispatched to administrator before.