Prevent producer to register new schema

Hi,
how can I disable on the server-side (=schema-registry-server) the registration of new schema-versions by Producers when sending new messages?

I read that on the Client / Producer side it is possible to set properties like this:

auto.register.schemas=false
use.latest.version=true

But I do not have control over all the producers and can not rely on them to set those properties correctly.
So this is why I want to disable schema-registration by the producers.
Important: This is wanted for specific topics only.
I want that sending of new messages that are not compatible to the latest schema in the registry is not possible.

How can I achive this?

kind regards, Andi