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 ('3893c7164135a42f9316e08635216649', -1, 1764019766, 1764019766, 'd849d8b5', 10, 0, 0)

Line : 187
File : sessions.php