Discuz! info: MySQL Query Error

Time: 2019-11-21 1:08pm
Script: /cia/index.php

SQL: DELETE FROM cdb_sessions WHERE sid='L1cYjL' OR lastactivity<(1574312888-900) OR ('0'<>'0' AND uid='0') OR (uid='0' AND ip1='34' AND ip2='204' AND ip3='173' AND ip4='36' AND lastactivity>1574312888-60)
Error: Incorrect key file for table 'cdb_sessions'; try to repair it
Errno.: 1034

Similar error report has beed dispatched to administrator before.