Hello Dear @Hhampuz
I want to change my wallet Because of i lost my wallet private key. My wallet is still logged in on my device but once logged out I can no longer access this wallet. So please change my wallet
I don't think you have anything to worry about. If you still have access to your wallet, I think you can still regenerate your private key or seed phrase. Unless you have other reasons of changing addresses.
Old Wallet - bc1qfn677dkq05w5q4cpeard8a8w4tgv4x5896cl09
New wallet - bc1qgc402npk2qylz86h856kggg80aswcnv9ezu9ye
It is not old wallet or new wallet. Call it old or new bitcoin address.
Next time you may decide to make this kind of request in private, coming public may prompt forum members wanting you to sign a message which might get you into troubles if you are unable to.