Discuz! info: MySQL Query Error

Time: 2021-4-20 5:03am
Script: /cia/index.php

SQL: DELETE FROM cdb_sessions WHERE sid='WPZ3Fa' OR lastactivity<(1618866190-900) OR ('0'<>'0' AND uid='0') OR (uid='0' AND ip1='3' AND ip2='238' AND ip3='174' AND ip4='50' AND lastactivity>1618866190-60)
Error: Incorrect key file for table 'cdb_sessions'; try to repair it
Errno.: 1034

Similar error report has beed dispatched to administrator before.