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`='13164d16465fb7f672752a4af1d4b22d',`time`=1711654975,`ip`=X'23adb23c',`location`='/showthread.php?tid=22371&pid=64483',`useragent`='claudebot',`location1`=2,`location2`=22371,`nopermission`=0