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`='43325599ce3ac4db403e53177cfcdac9',`time`=1711711118,`ip`=X'03523ad5',`location`='/showthread.php?tid=1119&pid=5394',`useragent`='claudebot',`location1`=2,`location2`=1119,`nopermission`=0