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`='275f6d818ed43fc30c052a82b32a7b0e',`time`=1711704644,`ip`=X'03e7d9d1',`location`='/member.php?action=profile&uid=879',`useragent`='claudebot',`location1`=0,`location2`=0,`nopermission`=0