Creating keys and addresses and Create Stake Pool Keys

In this part of the guide you create payment keys and addresses and stake keys and addresses.

In this part of the guide one creates a second address to send money to from the first address.

In this part of the guide one creates their payment.addr and stake.addr all over again, which overwrites the pervious ones created.
*/docs/handbook/create-stake-pool-keys

I am able to complete the first two parts, but when I get to create-stake-pool-keys or moving further I am blocked.

Why does one have to create stake.addr and payment.addr over again? If I change the payment.addr I will not be able to retrieve the funds I put in it(thankfully I have a backup).