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 ('08d6406d9889085610934eda7b52860c', -1, 1769638471, 1769638471, 'd849d83a', 1, 0, 0)

Line : 187
File : sessions.php