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 ('54f1a9ec4cd0366f8c94861a47d61856', -1, 1427944137, 1427944137, '3210679f', -1, 0)

Line : 158
File : sessions.php