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`='a9db2f1ef87a8b45bf98cfd3ef2391bf',`time`=1711676861,`ip`=X'36dd2b9b',`location`='/showthread.php?tid=2636',`useragent`='claudebot',`location1`=2,`location2`=2636,`nopermission`=0