phpBB : Critical Error

Error doing DB query userdata row fetch

DEBUG MODE

SQL Error : 145 Table './myforum/phpbb_sessions' is marked as crashed and should be repaired

SELECT u.*, s.* FROM phpbb_sessions s, phpbb_users u WHERE s.session_id = '33281dc2f40f7b14c79daf9f9e72a3c6' AND u.user_id = s.session_user_id

Line : 315
File : sessions.php