Error in query. Printed below for debugging

DELETE FROM sessions WHERE DATE_ADD(session_last_accessed, INTERVAL 3600 SECOND) < NOW()

126: Incorrect key file for table './finalfantasy14/sessions.MYI'; try to repair it
Error in query. Printed below for debugging

REPLACE INTO sessions (session_id, session_data) VALUES ('17dee8d196eaff06637c7838db4cb3ae', '')

126: Incorrect key file for table './finalfantasy14/sessions.MYI'; try to repair it