phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 144 Table './flacycl_bikeforum/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, session_admin) VALUES ('ad3a31a3184555b886088a1025f301c0', -1, 1474762448, 1474762448, '365b0b0b', 20, 0, 0)

Line : 187
File : sessions.php