phpBB : Critical Error

Error doing DB query userdata row fetch

DEBUG MODE

SQL Error : 144 Table './ekkso/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 = 'b856b7c8289a0f9fd3dfc5083f19159a' AND u.user_id = s.session_user_id

Line : 315
File : sessions.php