I have same thing. And it’s FIXED in. I can’t change or delete it. And I used to have a bunch of certificates. They disappeared and this one showed up.
but I also have a Comcast employee who is a software engineer stalking me since 2000 from FACEBOOK. Her and her sister/lover. Now living two doors from me!
so ever since they moved in I’m not even connected to Xfinity which is isp I pay for. The Mac connected with my router/modem is issued to “VANTIVA CONNECTED-HOME. I also have ports open that forward my data that I can’t change. She somehow made herself “administrator” over all my devices and controls them from her MAC. I happen to geolocate to a MAC at HER address. How do i get her off when I’ve been complaining about a decade; I don’t think anyone is even getting my emails, calls, texts, letters, chats. I’ve reported her to EVERY organization. Maybe I can get help here on the forum.