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`='0fba55443c814d406452cc53b656cbd8',`time`=1711669837,`ip`=X'0351dd79',`location`='/showthread.php?tid=3725',`useragent`='claudebot',`location1`=2,`location2`=3725,`nopermission`=0