RS produce by googlebot in login page

2016-01-11 04:34:00,517 [ajp-bio-8009-exec-363] ERROR AssertException - OLAT::ERROR ^%^ N1-E162
Mozilla/5.0 (iPhone; CPU iPhone OS 8_3 like Mac OS X) AppleWebKit/600.1.4 (KHTML, like Gecko) Version/8.0 Mobile/12F70 Safari/600.1.4 (compatible; Googlebot/2.1; +http://www.google.com/bot.html) ^%^ **RedScreen** a panel should never dispatch a request (unless it has droppables, which it has not), ureq = w:1, t:1, c:1008665194, ct:2, m:0, =https://xyz.de/dmz/1%3A1%3A1008665194%3A2%3A0%3Acid%3Alogout/ , params: {cid=logout}

<dispatchinfo>
	<componentinfo>
		<compname>mainContent</compname>
		<compclass>org.olat.core.gui.components.panel.Panel</compclass>
		<extendedinfo>stacksize:1, active:content | </extendedinfo>
		<event>	</event>
	</componentinfo>
	<controllerinfo> </controllerinfo>
</dispatchinfo>

>>> stack of 1.cause::org.olat.core.logging.AssertException: a panel should never dispatch a request (unless it has droppables, which it has not), ureq = w:1, t:1, c:1008665194, ct:2, m:0, =https://xyz.de/dmz/1%3A1%3A1008665194%3A2%3A0%3Acid%3Alogout/ , params: {cid=logout}
-> at org.olat.core.gui.components.panel.Panel.doDispatchRequest(Panel.java:54)
   at org.olat.core.gui.components.AbstractComponent.dispatchRequest(AbstractComponent.java:193)
   at org.olat.core.gui.components.Window.doDispatchToComponent(Window.java:1132)
   at org.olat.core.gui.components.Window.dispatchRequest(Window.java:629)
   at org.olat.core.gui.components.Window.doDispatchRequest(Window.java:234)
   at org.olat.core.gui.components.AbstractComponent.dispatchRequest(AbstractComponent.java:193)
   at org.olat.dispatcher.DMZDispatcher.execute(DMZDispatcher.java:272)
   at org.olat.core.servlets.OpenOLATServlet.executeUserRequest(OpenOLATServlet.java:280)
   at org.olat.core.servlets.OpenOLATServlet.doGet(OpenOLATServlet.java:209)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
   at org.olat.core.servlets.OpenOLATServlet.service(OpenOLATServlet.java:166)
>>> stack of 2.cause::java.lang.Exception: assertionstackgenerator
-> at org.olat.core.logging.AssertException.<init>(AssertException.java:53)
   at org.olat.core.gui.components.panel.Panel.doDispatchRequest(Panel.java:54)
   at org.olat.core.gui.components.AbstractComponent.dispatchRequest(AbstractComponent.java:193)
   at org.olat.core.gui.components.Window.doDispatchToComponent(Window.java:1132)
   at org.olat.core.gui.components.Window.dispatchRequest(Window.java:629)
   at org.olat.core.gui.components.Window.doDispatchRequest(Window.java:234)
   at org.olat.core.gui.components.AbstractComponent.dispatchRequest(AbstractComponent.java:193)
   at org.olat.dispatcher.DMZDispatcher.execute(DMZDispatcher.java:272)
   at org.olat.core.servlets.OpenOLATServlet.executeUserRequest(OpenOLATServlet.java:280)
   at org.olat.core.servlets.OpenOLATServlet.doGet(OpenOLATServlet.java:209)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)