Kafka starts throwing replication factor error as soon as spring boot app connects to it

Kafka starts flooding logs with the the error

INFO [Admin Manager on Broker 2]: Error processing create topic request CreatableTopic(name='__consumer_offsets', numPartitions=50, replicationFactor=3, assignments=[], configs=[CreateableTopicConfig(name='compression.type', value='producer'), CreateableTopicConfig(name='cleanup.policy', value='compact'), CreateableTopicConfig(name='segment.bytes', value='104857600')]) (kafka.server.ZkAdminManager) org.apache.kafka.common.errors.InvalidReplicationFactorException: Replication factor: 3 larger than available brokers: 1.

As soon as the spring boot application connects. Here's the Kafka config I pass via application yaml

spring:
  cloud:
    stream:
      instanceIndex: 0
      kafka:
        default:
          producer:
            topic:
              replication-factor: 1
            configuration:
              key:
                serializer: org.apache.kafka.common.serialization.StringSerializer
              spring:
                json:
                  add:
                    type:
                      headers: 'false'
              value:
                serializer: org.springframework.kafka.support.serializer.JsonSerializer
              max:
                block:
                  ms: '100'
          consumer:
            topic:
              replication-factor: 1
            configuration:
              key:
                deserializer: org.apache.kafka.common.serialization.StringDeserializer
              spring:
                json:
                  trusted:
                    packages: com.message
              value:
                deserializer: org.springframework.kafka.support.serializer.JsonDeserializer
        binder:
          autoCreateTopics: 'false'
          brokers: localhost:19092
          replicationFactor: 1
      bindings:
        consume-in-0:
          group: ${category}-${spring.application.name}-consumer-${runtime-env}
          destination: alm-tom-${runtime-env}
        publish-out-0:
          destination: ${category}-${spring.application.name}-${runtime-env}

I don't see any other config to control consumer-offsets topic replication factor