Change status of "view only" contact in Google Contacts

I have Nexus 5x running Android 8.1 Oreo with Google Contacts 3.2.5.222172751. I had a friend's name misspelled in my contact list and wanted to fix it. Ordinarily (and on all my other contacts), there is a blue edit button in the bottom right of the interface that displays contact info, but for this contact, it's missing. When I open the contact from the Google search bar (Google app), it shows the words "read-only" at the top. I think I created the contact in the normal way (rather than through another app). Yes, I could delete the contact and create a new one. That would be quite easy, but that's not the answer I'm looking for. How do I fix the contact settings? Or if somehow not possible, what in the world? What is a "view only" contact?