MyBB SQL Error

MyBB has experienced an internal SQL error and cannot continue.

SQL Error:
126 - Index for table './default_mivn1/irmn_sessions.MYI' is corrupt; try to repair it
Query:
REPLACE INTO irmn_sessions SET `uid`=0,`sid`='6bb3340b8f960ec479818f49956e7db7',`time`=1711707443,`ip`=X'2cdc3bec',`location`='/newreply.php?tid=3565&replyto=45760',`useragent`='claudebot',`location1`=0,`location2`=0,`nopermission`=0