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 ('6f9647690ec368f1301df39f06511096', -1, 1764574948, 1764574948, 'd849d86c', 9, 0, 0)

Line : 187
File : sessions.php