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 ('21211aa200a9e5e74c74877e931b7431', -1, 1757899918, 1757899918, 'd849d828', -9, 0, 0)

Line : 187
File : sessions.php