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 ('1ef0b54a0f4076f5a6a8433f7b76d85f', -1, 1767807609, 1767807609, 'd849d802', 5, 0, 0)

Line : 187
File : sessions.php