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 ('fea91f90d6d970c8e0d25603ca91b233', -1, 1488021488, 1488021488, '36a3a443', 20, 0, 0)

Line : 187
File : sessions.php