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 = '1f62bd3c1e4e63cdaf45d9d9c8aa2fe0' AND u.user_id = s.session_user_id

Line : 319
File : sessions.php