Discuz! info: MySQL Query Error

Time: 2019-1-24 7:13am
Script: /bbs/index.php

SQL: DELETE FROM _0731_sessions WHERE sid='k73lwe' OR lastactivity<(1548285220-900) OR ('0'<>'0' AND uid='0') OR (uid='0' AND ip1='100' AND ip2='24' AND ip3='46' AND ip4='10' AND lastactivity>1548285220-60)
Error: Incorrect key file for table '_0731_sessions'; try to repair it
Errno.: 1034

Similar error report has beed dispatched to administrator before.