phpBB by Przemo : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 144 Table './oprekpc_phpbb1/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 ('59155ffb494b92aac46aa13a742c3f0e', -1, 1461938507, 1461938507, '67e3933a', 50, 0, 0)

Line : 445
File : sessions.php