Well, everyone can freely choose and negotiate the contract terms for follow-up financing. So no one gets anything forced upon them anywhere. It is generally common practice to maintain the current repayment rate, which results in an annuity that is lower today. By the way, almost all banks do it that way. And you should definitely use your own brain. Or does anyone blindly sign whatever they get from the bank?
Nevertheless, everyone is free to keep the annuity and consequently increase the repayment. A phone call and 5 minutes should be enough at any good bank for that.