phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 144 Table './unitedheroes/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 ('58b6a7970e43ac0987b7f303b0bf34e2', -1, 1516680927, 1516680927, '36535134', 0, 0, 0)

Line : 187
File : sessions.php