Akka Cluster local discovery using akka-bootstrap and akka-discovery

I used a reference for my implementation.
//https://doc.akka.io/docs/akka-management/current/bootstrap/local-config.html

Discovery Method: Configuration

I want to use with the same hostname and different ports for cluster endpoints as mentioned in below conf file

Please find below conf file

When I start the first node, it is forming the cluster, When I start the second node it is forming its own cluster instead of joining existing cluster.

In the end, I don’t want to manually configure seed nodes, I want to have dynamic cluster formation based upon whichever node I start first.

Please help how to fix it.

akka {

  actor {
    provider = "cluster"
    allow-java-serialization = on
  }
  remote {

    maximum-payload-bytes = 10000000 bytes
    netty.tcp {

      message-frame-size = 10000000b
      send-buffer-size = 10000000b
      receive-buffer-size = 10000000b
      maximum-frame-size = 10000000b
    }

  }
  cluster {
    auto-down-unreachable-after = 10s #Not required in general.
    jmx.multi-beans-in-same-jvm = on
    jmx.multi-mbeans-in-same-jvm = on
  }
}

#coorindated-shutdown
#akka.cluster.shutdown-after-unsuccessful-join-seed-nodes = 30s
#akka.coordinated-shutdown.exit-jvm = on
#coorindated-shutdown

#discovery
akka.discovery {
  config.services = {
    local-cluster = {
      endpoints = [
      {
          host = "192.168.0.6"
          port = 8560
        },
         {
          host = "192.168.0.6"
          port = 8561
        }
        
      ]
    }
  }
}
#discovery

#health
akka.management.health-checks {
  readiness-path = "health/ready"
  liveness-path = "health/alive"
}
#health

akka.management.http {
  route-providers-read-only = false
  port = 8561
}


#bootstrap
akka.management {
  cluster.bootstrap {
    contact-point-discovery {
      service-name = "local-cluster"
      discovery-method = config
      required-contact-point-nr = 1
    }
  }
}
#bootstrap

Java code

	final Config config = 
		
			ConfigFactory.parseString("akka.remote.artery.canonical.hostname=192.168.0.6 \n"
				      + "akka.management.http.hostname = 192.168.0.6 \n"
				      + "akka.remote.artery.canonical.port=" + configuration.getPort()
				    )
			.withFallback(ConfigFactory.parseString("akka.cluster.roles = ["+ROLE_PRODUCER+"]"))
			.withFallback(ConfigFactory.load("communication.conf"));

	system = ActorSystem.create(configuration.getActorSystem(), config);

	producer = system.actorOf(
			Props.create(ProducerActor.class , consumerQueue , consumers, configuration, commConfig), AkkaConstants.PRODUCER_ACTOR );
	
	AkkaManagement.get(system).start();
	ClusterBootstrap.get(system).start();
	
	cluster = Cluster.get(system);