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 ('3d6c5e1462e31dd9df53b3564f594863', -1, 1769653107, 1769653107, 'd849d83a', 1, 0, 0)

Line : 187
File : sessions.php