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 ('d31057769f83068a905a4e51fd69a088', -1, 1764619520, 1764619520, 'd849d86c', 8, 0, 0)

Line : 187
File : sessions.php