Recently, by mistake, the private key of my name delta is a friend, and I would like to know how I change, thanks for the attention.
I can't understand but you mean to say that your private key was mistakenly owned by your others? How come that is possible? It's not possible to own the private keys that belongs to you as long as you are the only one that knows it.
Is someone tries to scam you and says that he/she owns the private keys you have?
There's no way to change the private keys, you can easily create a new wallet and generate new private keys.
Transfer every important ERC 20 tokens or all of it to the new one and keep your private keys for yourself only.