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 ('4fea6bcce578cb8d3634dd14c8d8e48c', -1, 1768435614, 1768435614, 'd849d89c', 1, 0, 0)

Line : 187
File : sessions.php