phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in) VALUES ('4f85a4725ea2d8608fc95cadd4791a19', -1, 1414285334, 1414285334, '36d3b4af', 23, 0)

Line : 158
File : sessions.php