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javax.faces.FacesException: Cannot add the same component twice: javax_faces_location_HEAD	at com.sun.faces.context.StateContext$DynamicAddRemoveListener.handleAddRemoveWithAutoPrune(StateContext.java:751)	at com.sun.faces.context.StateContext$DynamicAddRemoveListener.handleAdd(StateContext.java:667)	at com.sun.faces.context.StateContext$AddRemoveListener.processEvent(StateContext.java:352)	at com.sun.faces.context.StateContext$DynamicAddRemoveListener.processEvent(StateContext.java:568)	at javax.faces.event.SystemEvent.processListener(SystemEvent.java:106)	at com.sun.faces.application.ApplicationImpl.processListenersAccountingForAdds(ApplicationImpl.java:2215)	at com.sun.faces.application.ApplicationImpl.invokeViewListenersFor(ApplicationImpl.java:2033)	at com.sun.faces.application.ApplicationImpl.publishEvent(ApplicationImpl.java:292)	at com.sun.faces.application.ApplicationImpl.publishEvent(ApplicationImpl.java:247)	at javax.faces.component.UIComponentBase.publishAfterViewEvents(UIComponentBase.java:2203)	at javax.faces.component.UIComponentBase.doPostAddProcessing(UIComponentBase.java:1885)	at javax.faces.component.UIComponentBase.setParent(UIComponentBase.java:405)	at javax.faces.component.UIComponentBase$FacetsMap.put(UIComponentBase.java:2943)	at javax.faces.component.UIComponentBase$FacetsMap.put(UIComponentBase.java:2903)	at javax.faces.component.UIViewRoot.getComponentResources(UIViewRoot.java:1749)	at javax.faces.component.UIViewRoot.addComponentResource(UIViewRoot.java:517)	at org.icefaces.impl.event.RestoreResourceDependencies.addResourceDependency(RestoreResourceDependencies.java:110)	at org.icefaces.impl.event.RestoreResourceDependencies.collectResourceDependencies(RestoreResourceDependencies.java:76)	at org.icefaces.impl.event.RestoreResourceDependencies.access$000(RestoreResourceDependencies.java:37)	at org.icefaces.impl.event.RestoreResourceDependencies$1.visit(RestoreResourceDependencies.java:49)	at com.sun.faces.component.visit.FullVisitContext.invokeVisitCallback(FullVisitContext.java:151)	at javax.faces.component.UIComponent.visitTree(UIComponent.java:1611)	at javax.faces.component.UIComponent.visitTree(UIComponent.java:1622)	at javax.faces.component.UIForm.visitTree(UIForm.java:371)	at javax.faces.component.UIComponent.visitTree(UIComponent.java:1622)	at javax.faces.component.UIComponent.visitTree(UIComponent.java:1622)	at javax.faces.component.UIComponent.visitTree(UIComponent.java:1622)	at org.icefaces.impl.event.RestoreResourceDependencies.processEvent(RestoreResourceDependencies.java:47)	at javax.faces.event.SystemEvent.processListener(SystemEvent.java:106)	at com.sun.faces.application.ApplicationImpl.processListeners(ApplicationImpl.java:2166)	at com.sun.faces.application.ApplicationImpl.invokeListenersFor(ApplicationImpl.java:2139)	at com.sun.faces.application.ApplicationImpl.publishEvent(ApplicationImpl.java:303)	at com.sun.faces.application.ApplicationImpl.publishEvent(ApplicationImpl.java:247)	at javax.faces.component.UIComponentBase.encodeBegin(UIComponentBase.java:814)	at javax.faces.component.UIViewRoot.encodeBegin(UIViewRoot.java:954)	at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1776)	at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:426)	at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:125)	at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:286)	at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:120)	at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)	at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:604)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:393)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:503)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:136)	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610)	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:526)	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1078)	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:655)	at org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:222)	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1566)	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1523)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)	at java.lang.Thread.run(Thread.java:745)