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 ('ed93fe193b56fda84b2f04d3e9d9dc35', -1, 1480941211, 1480941211, '369ea789', -1, 0)

Line : 158
File : sessions.php