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`='55c052be76922430dc8a42b9eb9c7633',`time`=1711706324,`ip`=X'22cfb48d',`location`='/showthread.php?tid=3694',`useragent`='claudebot',`location1`=2,`location2`=3694,`nopermission`=0