phpBB : Critical Error

Error doing DB query userdata row fetch

DEBUG MODE

SQL Error : 144 Table './judgement4/phpbb_sessions' is marked as crashed and last (automatic?) repair failed

SELECT u.*, s.* FROM phpbb_sessions s, phpbb_users u WHERE s.session_id = '89d4c28e8d2b350ab27d7b3e010ac5ed' AND u.user_id = s.session_user_id

Line : 315
File : sessions.php