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 ('71ac4f348399fbb13ad775294b76f460', -1, 1766514331, 1766514331, 'd849d817', -2, 0, 0)

Line : 187
File : sessions.php