Hi K3vin1130,
I've not seen this problem before, but I was able to find one other person on the Microsoft Forums that shared the same issue. I'm posting a link to the thread below. This occured on a Windows 7 installation as well.
Unfortunatley it looks like all their troubleshooting advice didn't produce a fix for the problem, but it might be a place to start and if it doesn't work let us know.
https://answers.microsoft.com/en-us/windows/forum/windows_7-security/i-want-to-eliminate-homegroupuser-as-the-default/75795ee5-fd33-4f3e-8b63-637c8dccb5c4
I honestly suspect the best use of your time would be to either try a repair, or backup your data and re-install Windows 10.