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`='70bc26aadd3436c0bfad016c7d7e37e8',`time`=1711647528,`ip`=X'22e28dcf',`location`='/showthread.php?tid=1487',`useragent`='claudebot',`location1`=2,`location2`=1487,`nopermission`=0