phpBB : Erro Crítico

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 2

INSERT INTO f_activesessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('a56fc2f59cda57a0b967b31d84bdecc6', -1, 1766750596, 1766750596, 'd849d817', 1, 0, 0)

Line : 187
File : sessions.php