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, jos_users u WHERE s.session_id = '6ae114b6b684791cc3f817625cf62d80' AND u.id = s.session_user_id

Line : 351
File : sessions.php