Exception thrown when opening Poll document type

INFO] [talledLocalContainer] 16.06.2016 15:27:41 ERROR [org.onehippo.forge.poll.cms.PollResultsPlugin.getPollResults():179] RepositoryException while reading poll results
[INFO] [talledLocalContainer] javax.jcr.ItemNotFoundException: Root node doesn't have a parent
[INFO] [talledLocalContainer] 	at org.apache.jackrabbit.core.NodeImpl$6.perform(NodeImpl.java:1754)
[INFO] [talledLocalContainer] 	at org.apache.jackrabbit.core.NodeImpl$6.perform(NodeImpl.java:1747)
[INFO] [talledLocalContainer] 	at org.apache.jackrabbit.core.session.SessionState.perform(SessionState.java:216)
[INFO] [talledLocalContainer] 	at org.apache.jackrabbit.core.ItemImpl.perform(ItemImpl.java:91)
[INFO] [talledLocalContainer] 	at org.apache.jackrabbit.core.NodeImpl.getParent(NodeImpl.java:1747)
[INFO] [talledLocalContainer] 	at org.hippoecm.repository.decorating.ItemDecorator.getParent(ItemDecorator.java:105)
[INFO] [talledLocalContainer] 	at org.onehippo.forge.poll.cms.PollResultsPlugin.getPollDataPath(PollResultsPlugin.java:224)
[INFO] [talledLocalContainer] 	at org.onehippo.forge.poll.cms.PollResultsPlugin.getPollResults(PollResultsPlugin.java:161)
[INFO] [talledLocalContainer] 	at org.onehippo.forge.poll.cms.PollResultsPlugin.<init>(PollResultsPlugin.java:80)
[INFO] [talledLocalContainer] 	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
[INFO] [talledLocalContainer] 	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
[INFO] [talledLocalContainer] 	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
[INFO] [talledLocalContainer] 	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
[INFO] [talledLocalContainer] 	at org.hippoecm.frontend.plugin.impl.PluginFactory.createPlugin(PluginFactory.java:69)
[INFO] [talledLocalContainer] 	at org.hippoecm.frontend.plugin.impl.PluginManager.start(PluginManager.java:84)
[INFO] [talledLocalContainer] 	at org.hippoecm.frontend.plugin.impl.PluginContext.start(PluginContext.java:372)
[INFO] [talledLocalContainer] 	at org.hippoecm.frontend.plugin.impl.ClusterControl.start(ClusterControl.java:125)
[INFO] [talledLocalContainer] 	at org.hippoecm.frontend.editor.builder.RenderPluginEditorPlugin.updatePreview(RenderPluginEditorPlugin.java:336)
[INFO] [talledLocalContainer] 	at org.hippoecm.frontend.editor.builder.RenderPluginEditorPlugin.onStart(RenderPluginEditorPlugin.java:217)
[INFO] [talledLocalContainer] 	at org.hippoecm.frontend.service.render.RenderPlugin.start(RenderPlugin.java:79)
[INFO] [talledLocalContainer] 	at org.hippoecm.frontend.plugin.impl.PluginContext.connect(PluginContext.java:339)
[INFO] [talledLocalContainer] 	at org.hippoecm.frontend.plugin.impl.PluginManager.start(PluginManager.java:86)
[INFO] [talledLocalContainer] 	at org.hippoecm.frontend.plugin.impl.PluginContext.start(PluginContext.java:372)
[INFO] [talledLocalContainer] 	at org.hippoecm.frontend.plugin.impl.ClusterControl.start(ClusterControl.java:125)
[INFO] [talledLocalContainer] 	at org.hippoecm.frontend.editor.builder.TemplateTypeEditorPlugin.onModelChanged(TemplateTypeEditorPlugin.java:195)
[INFO] [talledLocalContainer] 	at org.apache.wicket.Component.modelChanged(Component.java:2166)
[INFO] [talledLocalContainer] 	at org.hippoecm.frontend.editor.builder.TemplateTypeEditorPlugin.render(TemplateTypeEditorPlugin.java:226)
[INFO] [talledLocalContainer] 	at org.hippoecm.frontend.service.render.AbstractRenderService.render(AbstractRenderService.java:418)
[INFO] [talledLocalContainer] 	at org.hippoecm.frontend.service.render.RenderPlugin.render(RenderPlugin.java:122)
[INFO] [talledLocalContainer] 	at org.hippoecm.frontend.service.render.AbstractRenderService.render(AbstractRenderService.java:418)
[INFO] [talledLocalContainer] 	at org.hippoecm.frontend.service.render.RenderPlugin.render(RenderPlugin.java:122)
[INFO] [talledLocalContainer] 	at org.hippoecm.frontend.service.render.AbstractRenderService.render(AbstractRenderService.java:418)
[INFO] [talledLocalContainer] 	at org.hippoecm.frontend.service.render.RenderPlugin.render(RenderPlugin.java:122)
[INFO] [talledLocalContainer] 	at org.hippoecm.frontend.plugins.standards.perspective.Perspective.render(Perspective.java:198)
[INFO] [talledLocalContainer] 	at org.hippoecm.frontend.service.render.AbstractRenderService.render(AbstractRenderService.java:418)
[INFO] [talledLocalContainer] 	at org.hippoecm.frontend.editor.AbstractCmsEditor$EditorWrapper.render(AbstractCmsEditor.java:101)
[INFO] [talledLocalContainer] 	at org.hippoecm.frontend.plugins.standards.tabs.TabsPlugin.render(TabsPlugin.java:191)
[INFO] [talledLocalContainer] 	at org.hippoecm.frontend.service.render.AbstractRenderService.render(AbstractRenderService.java:418)
[INFO] [talledLocalContainer] 	at org.hippoecm.frontend.service.render.RenderPlugin.render(RenderPlugin.java:122)
[INFO] [talledLocalContainer] 	at org.hippoecm.frontend.plugins.standards.perspective.Perspective.render(Perspective.java:198)
[INFO] [talledLocalContainer] 	at org.hippoecm.frontend.plugins.cms.browse.BrowserPerspective.render(BrowserPerspective.java:169)
[INFO] [talledLocalContainer] 	at org.hippoecm.frontend.plugins.standards.tabs.TabsPlugin.render(TabsPlugin.java:191)
[INFO] [talledLocalContainer] 	at org.hippoecm.frontend.plugins.cms.root.RootPlugin.render(RootPlugin.java:225)
[INFO] [talledLocalContainer] 	at org.hippoecm.frontend.PluginPage.render(PluginPage.java:273)
[INFO] [talledLocalContainer] 	at org.hippoecm.frontend.PluginRequestTarget.respond(PluginRequestTarget.java:148)
[INFO] [talledLocalContainer] 	at org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:890)
[INFO] [talledLocalContainer] 	at org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64)
[INFO] [talledLocalContainer] 	at org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:97)
[INFO] [talledLocalContainer] 	at org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:261)
[INFO] [talledLocalContainer] 	at org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:218)
[INFO] [talledLocalContainer] 	at org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:289)
[INFO] [talledLocalContainer] 	at org.apache.wicket.protocol.http.WicketFilter.processRequestCycle(WicketFilter.java:259)
[INFO] [talledLocalContainer] 	at org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:201)
[INFO] [talledLocalContainer] 	at org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:282)
[INFO] [talledLocalContainer] 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
[INFO] [talledLocalContainer] 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
[INFO] [talledLocalContainer] 	at org.hippoecm.frontend.plugins.login.ConcurrentLoginFilter.doFilter(ConcurrentLoginFilter.java:54)
[INFO] [talledLocalContainer] 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
[INFO] [talledLocalContainer] 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
[INFO] [talledLocalContainer] 	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
[INFO] [talledLocalContainer] 	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
[INFO] [talledLocalContainer] 	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
[INFO] [talledLocalContainer] 	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
[INFO] [talledLocalContainer] 	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
[INFO] [talledLocalContainer] 	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
[INFO] [talledLocalContainer] 	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
[INFO] [talledLocalContainer] 	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:528)
[INFO] [talledLocalContainer] 	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1099)
[INFO] [talledLocalContainer] 	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:670)
[INFO] [talledLocalContainer] 	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520)
[INFO] [talledLocalContainer] 	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476)
[INFO] [talledLocalContainer] 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
[INFO] [talledLocalContainer] 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
[INFO] [talledLocalContainer] 	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
[INFO] [talledLocalContainer] 	at java.lang.Thread.run(Thread.java:745)

[INFO] [talledLocalContainer] 16.06.2016 15:27:41 WARN  [org.hippoecm.frontend.model.JcrItemModel.writeObject():352] Undetached JcrItemModel /content/documents
[INFO] [talledLocalContainer] 16.06.2016 15:27:41 WARN  [org.hippoecm.frontend.model.JcrItemModel.writeObject():352] Undetached JcrItemModel /hippo:namespaces
[INFO] [talledLocalContainer] 16.06.2016 15:27:41 WARN  [org.hippoecm.frontend.model.JcrItemModel.writeObject():352] Undetached JcrItemModel /content/documents
[INFO] [talledLocalContainer] 16.06.2016 15:27:41 WARN  [org.hippoecm.frontend.model.JcrItemModel.writeObject():352] Undetached JcrItemModel /hippo:namespaces
[INFO] [talledLocalContainer] 16.06.2016 15:28:02 WARN  [org.hippoecm.frontend.model.JcrItemModel.writeObject():352] Undetached JcrItemModel /content/documents