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`='f7124aca92af40f4038e22a55bcffa84',`time`=1711672637,`ip`=X'2cd41af8',`location`='/showthread.php?tid=3610',`useragent`='claudebot',`location1`=2,`location2`=3610,`nopermission`=0