Whatsapp won’t let me change contact name

I’ve been having this problem where I wanted to change a certain contact’s name because it’s wrong but in the edit option it said the contact is “read only”, so I tried to delete that contact, and it worked for like 5 minutes. But whatsapp apparently created that contact again.

I tried deleting WhatsApp and reinstalling it, but the problem is still there. What do I do?