MyBB SQL Error

MyBB has experienced an internal SQL error and cannot continue.

SQL Error:
145 - Table './balkania_forum/mybb_sessions' is marked as crashed and should be repaired
Query:
REPLACE INTO mybb_sessions SET `uid`=0,`sid`='328bfd6c8c6d3d302913cb38a209ac6f',`time`=1711709511,`ip`=X'23aa40b9',`location`='/showthread.php?tid=467',`useragent`='claudebot',`location1`=5,`location2`=467,`nopermission`=0