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`='1310ea6ad6e800fdef3f39357b401142',`time`=1711711987,`ip`=X'0352e81f',`location`='/showthread.php?mode=linear&tid=303&pid=2709',`useragent`='claudebot',`location1`=8,`location2`=303,`nopermission`=0