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`='c30580ececd55ecc75c6176cc7320719',`time`=1711640927,`ip`=X'2cc03522',`location`='/showthread.php?tid=3135',`useragent`='claudebot',`location1`=2,`location2`=3135,`nopermission`=0