phpBB : Critical Error

Error doing DB query userdata row fetch

DEBUG MODE

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

SELECT u.*, s.* FROM phpbb_sessions s, phpbb_users u WHERE s.session_id = 'a58070880fb5a1d4b1d40f50346140d7' AND u.user_id = s.session_user_id

Line : 315
File : sessions.php