Spring cloud streams kafka streams state store

Question

I want to get state store with custom key and value.

I have a kafka topic example-kafka-topic-event.

This is how I get ktable at the code level:

@Component("example")
public class DeputyEventListener implements BiConsumer<KStream<String, String>, KTable<String, String>> {

    @Override
    public void accept(KStream<String, String> deputyEventStream, KTable<String, String> deputyEntity) {
        deputyEntity.toStream()
                .peek((key, value) -> System.out.println("IN TABLE VALUES IS + " + value + " ON KEY " + key));
    }
}

Here with such a property:

spring.cloud.stream.bindings.example-in-1:
    destination: example-kafka-topic-event
    consumer:
        materializedAs: example-state-store

I don't want to use Key Value just like in the kafka topic. I want to convert and use another field in ktable as a key. How can I do this? Is there any option to do such a conversion without losing the convenience of Spring cloud streams?