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 = '6e19e69958351f0d9e19e435d3e5496a' AND u.user_id = s.session_user_id

Line : 315
File : sessions.php