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 ('35d15dd56203a7925b4b325bd0f73f3c', -1, 1768740842, 1768740842, 'd849d854', 3, 0, 0)

Line : 187
File : sessions.php