phpBB : Critical Error

Error doing DB query userdata row fetch

DEBUG MODE

SQL Error : 144 Table './metromtl_phpbb/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 = '5fcacd4d25410b55ca7b3c6ad6f8c05a' AND u.user_id = s.session_user_id

Line : 315
File : sessions.php