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 ('f7d8a69cf46b97c745200e7c7a1c3b98', -1, 1757968859, 1757968859, 'd849d828', 8, 0, 0)

Line : 187
File : sessions.php