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 ('85ab50ff3d20e9a1837f4edc3a2a8dfe', -1, 1472117975, 1472117975, '365063ed', -1, 0)

Line : 158
File : sessions.php