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`='89343f54e0f790eec4130055c280e535',`time`=1711717048,`ip`=X'1716ec5a',`location`='/showthread.php?tid=2181&pid=7850',`useragent`='claudebot',`location1`=2,`location2`=2181,`nopermission`=0