We have an environment that previously had 4 stream servers. But now only 1. We would like to decommission 3 of the servers.

When we try the Decommission action from the Stream admin page nothing happens in the UI and in the logs we get...  

2020-06-05 11:56:16,875 [   PegaRULES-Batch-4] [  STANDARD] [                    ] [RegistrationFW:02.99] (ernal.async.BatchRequestorTask) ERROR  XXXX - Batch activity "Embed-Decision-Service-Operation.pzAsyncExecuteOperation" threw:
com.pega.pegarules.pub.PRRuntimeError: PRRuntimeError
    at com.pega.pegarules.session.internal.mgmt.base.ThreadRunner.runActivitiesAlt(ThreadRunner.java:721) ~[prprivate-session.jar:?]
    at com.pega.pegarules.session.internal.mgmt.base.ThreadRunner.runActivities(ThreadRunner.java:580) ~[prprivate-session.jar:?]
    at com.pega.pegarules.session.internal.mgmt.PRThreadImpl.runActivities(PRThreadImpl.java:511) ~[prprivate-session.jar:?]
    at com.pega.pegarules.session.internal.async.agent.QueueProcessor.executeBatchTask(QueueProcessor.java:304) ~[prprivate-session.jar:?]
    at com.pega.pegarules.session.internal.async.agent.QueueProcessor.execute(QueueProcessor.java:371) ~[prprivate-session.jar:?]
    at com.pega.pegarules.session.internal.async.BatchRequestorTask.run(BatchRequestorTask.java:1158) ~[prprivate-session.jar:?]
    at com.pega.pegarules.session.internal.PRSessionProviderImpl.performTargetActionWithLock(PRSessionProviderImpl.java:1397) ~[prprivate-session.jar:?]
    at com.pega.pegarules.session.internal.PRSessionProviderImpl.doWithRequestorLocked(PRSessionProviderImpl.java:1140) ~[prprivate-session.jar:?]
    at com.pega.pegarules.session.internal.PRSessionProviderImpl.doWithRequestorLocked(PRSessionProviderImpl.java:1021) ~[prprivate-session.jar:?]
    at com.pega.pegarules.session.internal.async.BatchRequestorTask.run(BatchRequestorTask.java:818) ~[prprivate-session.jar:?]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_252]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_252]
    at java.lang.Thread.run(Thread.java:748) [?:1.8.0_252]
Caused by: com.pega.dsm.dnode.api.StreamServiceException: Unable to execute reassignment, brokers 1002, 1004 are offline
    at com.pega.dsm.kafka.scale.service.StreamUtilServiceImpl.executeReassignment(StreamUtilServiceImpl.java:183) ~[d-node.jar:?]
    at com.pega.dsm.kafka.scale.service.StreamUtilServiceImpl.executeReassignmentExcludingBroker(StreamUtilServiceImpl.java:174) ~[d-node.jar:?]
    at com.pega.dsm.dnode.api.server.StreamServerService$StreamServiceDecommissionOperation$2$1.execute(StreamServerService.java:891) ~[d-node.jar:?]

Is there another way that we can remove the Stream nodes? Maybe a table we can update?

thanks,