syncope paste

Unexpected RuntimeException
Last cause: Component [Component id = alerts] cannot be updated because it is on another page.

Stacktrace
Root cause:

java.lang.IllegalArgumentException: Component [Component id = alerts] cannot be updated because it is on another page.
     at org.apache.wicket.page.PartialPageUpdate.add(PartialPageUpdate.java:451)
     at org.apache.wicket.ajax.AjaxRequestHandler.add(AjaxRequestHandler.java:241)
     at org.apache.wicket.ajax.AjaxRequestHandler.add(AjaxRequestHandler.java:234)
     at org.apache.syncope.client.console.widgets.UserRequestFormsWidget.refreshLatestAlerts(UserRequestFormsWidget.java:77)
     at org.apache.syncope.client.console.panels.UserRequestFormDirectoryPanel$2.onClose(UserRequestFormDirectoryPanel.java:106)
     at org.apache.syncope.client.console.wicket.markup.html.bootstrap.dialog.BaseModal.onClose(BaseModal.java:189)
     at org.apache.syncope.client.console.wicket.markup.html.bootstrap.dialog.BaseModal$4.onEvent(BaseModal.java:327)
     at org.apache.wicket.ajax.AjaxEventBehavior.respond(AjaxEventBehavior.java:127)
     at org.apache.wicket.ajax.AbstractDefaultAjaxBehavior.onRequest(AbstractDefaultAjaxBehavior.java:598)
     at org.apache.wicket.core.request.handler.ListenerRequestHandler.internalInvoke(ListenerRequestHandler.java:306)
     at org.apache.wicket.core.request.handler.ListenerRequestHandler.invoke(ListenerRequestHandler.java:280)
     at org.apache.wicket.core.request.handler.ListenerRequestHandler.invokeListener(ListenerRequestHandler.java:222)
     at org.apache.wicket.core.request.handler.ListenerRequestHandler.respond(ListenerRequestHandler.java:208)
     at org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:914)
     at org.apache.wicket.request.RequestHandlerExecutor.execute(RequestHandlerExecutor.java:65)
     at org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:282)
     at org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:253)
     at org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:221)
     at org.apache.wicket.protocol.ws.AbstractUpgradeFilter.processRequestCycle(AbstractUpgradeFilter.java:70)
     at org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:206)
     at org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:299)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:200)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
     at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
     at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:678)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
     at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
     at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
     at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:836)
     at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1747)
     at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
     at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
     at java.lang.Thread.run(Thread.java:745)