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 ('d1da9c794a6559d75ff3581196f1e9de', -1, 1766145994, 1766145994, 'd849d817', 1, 0, 0)

Line : 187
File : sessions.php