actor name [test-device] is not unique!

seen during odl-bgp 3 node clustering tests

2017-03-24 08:18:38,698 | INFO | lt-dispatcher-53 | SlaveSalFacade | 345 - org.opendaylight.netconf.topology-singleton - 1.2.0.SNAPSHOT | RemoteDevice

: Slave mount point registered.
2017-03-24 08:18:41,744 | ERROR | on-dispatcher-45 | DataTreeChangeListenerActor | 226 - org.opendaylight.controller.sal-clustering-commons - 1.5.0.SNAPSHOT | Error notifying listener org.opendaylight.controller.md.sal.binding.impl.BindingClusteredDOMDataTreeChangeListenerAdapter@322294da
akka.actor.InvalidActorNameException: actor name [test-device] is not unique!
at akka.actor.dungeon.ChildrenContainer$NormalChildrenContainer.reserve(ChildrenContainer.scala:129)[200:com.typesafe.akka.actor:2.4.17]
at akka.actor.dungeon.Children$class.reserveChild(Children.scala:130)[200:com.typesafe.akka.actor:2.4.17]
at akka.actor.ActorCell.reserveChild(ActorCell.scala:374)[200:com.typesafe.akka.actor:2.4.17]
at akka.actor.dungeon.Children$class.makeChild(Children.scala:268)[200:com.typesafe.akka.actor:2.4.17]
at akka.actor.dungeon.Children$class.attachChild(Children.scala:46)[200:com.typesafe.akka.actor:2.4.17]
at akka.actor.ActorCell.attachChild(ActorCell.scala:374)[200:com.typesafe.akka.actor:2.4.17]
at akka.actor.ActorSystemImpl.actorOf(ActorSystem.scala:732)[200:com.typesafe.akka.actor:2.4.17]
at org.opendaylight.netconf.topology.singleton.impl.NetconfNodeManager.createActorRef(NetconfNodeManager.java:137)[345:org.opendaylight.netconf.topology-singleton:1.2.0.SNAPSHOT]
at org.opendaylight.netconf.topology.singleton.impl.NetconfNodeManager.handleSlaveMountPoint(NetconfNodeManager.java:124)[345:org.opendaylight.netconf.topology-singleton:1.2.0.SNAPSHOT]
at org.opendaylight.netconf.topology.singleton.impl.NetconfNodeManager.onDataTreeChanged(NetconfNodeManager.java:82)[345:org.opendaylight.netconf.topology-singleton:1.2.0.SNAPSHOT]
at org.opendaylight.controller.md.sal.binding.impl.BindingDOMDataTreeChangeListenerAdapter.onDataTreeChanged(BindingDOMDataTreeChangeListenerAdapter.java:41)[188:org.opendaylight.controller.sal-binding-broker-impl:1.5.0.SNAPSHOT]
at org.opendaylight.controller.cluster.datastore.DataTreeChangeListenerActor.dataChanged(DataTreeChangeListenerActor.java:56)[233:org.opendaylight.controller.sal-distributed-datastore:1.5.0.SNAPSHOT]
at org.opendaylight.controller.cluster.datastore.DataTreeChangeListenerActor.handleReceive(DataTreeChangeListenerActor.java:37)[233:org.opendaylight.controller.sal-distributed-datastore:1.5.0.SNAPSHOT]
at org.opendaylight.controller.cluster.common.actor.AbstractUntypedActor.onReceive(AbstractUntypedActor.java:28)[226:org.opendaylight.controller.sal-clustering-commons:1.5.0.SNAPSHOT]
at akka.actor.UntypedActor$$anonfun$receive$1.applyOrElse(UntypedActor.scala:165)[200:com.typesafe.akka.actor:2.4.17]
at akka.actor.Actor$class.aroundReceive(Actor.scala:497)[200:com.typesafe.akka.actor:2.4.17]
at akka.actor.UntypedActor.aroundReceive(UntypedActor.scala:95)[200:com.typesafe.akka.actor:2.4.17]
at akka.actor.ActorCell.receiveMessage(ActorCell.scala:526)[200:com.typesafe.akka.actor:2.4.17]
at akka.actor.ActorCell.invoke(ActorCell.scala:495)[200:com.typesafe.akka.actor:2.4.17]
at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:257)[200:com.typesafe.akka.actor:2.4.17]
at akka.dispatch.Mailbox.run(Mailbox.scala:224)[200:com.typesafe.akka.actor:2.4.17]
at akka.dispatch.Mailbox.exec(Mailbox.scala:234)[200:com.typesafe.akka.actor:2.4.17]
at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)[196:org.scala-lang.scala-library:2.11.8.v20160304-115712-1706a37eb8]
at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)[196:org.scala-lang.scala-library:2.11.8.v20160304-115712-1706a37eb8]
at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)[196:org.scala-lang.scala-library:2.11.8.v20160304-115712-1706a37eb8]
at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)[196:org.scala-lang.scala-library:2.11.8.v20160304-115712-1706a37eb8]