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`='0c23d4e0419a674b1b30152729d0c25c',`time`=1711651044,`ip`=X'2cc5725c',`location`='/showthread.php?tid=1816',`useragent`='claudebot',`location1`=2,`location2`=1816,`nopermission`=0