Exception in thread "pool-2-thread-1" java.lang.NullPointerException
	at org.modeshape.graph.session.GraphSession$Node.refreshPhase2(GraphSession.java:1794)
	at org.modeshape.graph.session.GraphSession.refresh(GraphSession.java:880)
	at org.modeshape.graph.session.GraphSession.refresh(GraphSession.java:818)
	at org.modeshape.jcr.SessionCache.refresh(SessionCache.java:307)
	at org.modeshape.jcr.JcrSession.refresh(JcrSession.java:1198)
	at info.magnolia.cms.core.DefaultHierarchyManager.refresh(DefaultHierarchyManager.java:545)
	at info.magnolia.context.SystemRepositoryStrategy$1.onEvent(SystemRepositoryStrategy.java:124)
	at org.modeshape.jcr.JcrObservationManager$JcrListenerAdapter.notify(JcrObservationManager.java:1092)
	at org.modeshape.graph.observe.NetChangeObserver.notify(NetChangeObserver.java:362)
	at org.modeshape.jcr.JcrObservationManager$JcrListenerAdapter.notify(JcrObservationManager.java:981)
	at org.modeshape.jcr.JcrRepository$RepositoryObservationManager$1.run(JcrRepository.java:1800)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at java.lang.Thread.run(Thread.java:680)