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`='de3eb19100c2df5a9c2d1f7632233519',`time`=1711617798,`ip`=X'36ea8893',`location`='/showthread.php?tid=764',`useragent`='claudebot',`location1`=2,`location2`=764,`nopermission`=0