phpBB : Critical Error

Error doing DB query userdata row fetch

DEBUG MODE

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

SELECT u.*, s.* FROM phpbb_sessions s, phpbb_users u WHERE s.session_id = '3ee8e76071fdc80f0e7d8d56413e9688' AND u.user_id = s.session_user_id

Line : 319
File : sessions.php