RS if edit description of course while someone delete it

2016-02-02 11:37:01,382 [ajp-nio2-8049-exec-1] ERROR OLATRuntimeException - OLAT::ERROR ^%^ N49-E57 ^%^ org.olat.core.logging 

https://xyz.frentix.com/auth/1%3A1%3A0%3A0%3A0/ ^%^ Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko 

 **RedScreen** No entity found for query 
<dispatchinfo>
	<componentinfo>
		<compname>ffo_main_bgrep</compname>
		<compclass>org.olat.core.gui.components.form.flexible.impl.FormWrapperContainer</compclass>
		<extendedinfo>n/a</extendedinfo>
		<event>
			<class&gt;org.olat.core.gui.control.Event</class&gt;
			<command>validation ok</command>
			<tostring>com:validation ok,org.olat.core.gui.control.Event@d62b3f02</tostring>
		</event>
	</componentinfo>
	<controllerinfo>
		<controllername>org.olat.repository.ui.author.RepositoryEditDescriptionController</controllername>
		<controllername>org.olat.course.run.CourseRuntimeController</controllername>
		<controllername>org.olat.core.commons.fullWebApp.BaseFullWebappController</controllername>
	</controllerinfo>
</dispatchinfo>

>>> stack of 1.cause::org.olat.core.logging.OLATRuntimeException: No entity found for query
-> at org.olat.core.gui.exception.ExceptionWindowController.<init>(ExceptionWindowController.java:116)
   at org.olat.core.gui.exception.MsgFactory.createMessageChiefController(MsgFactory.java:57)
   at org.olat.core.gui.exception.MsgFactory.createMessageChiefController(MsgFactory.java:46)
   at org.olat.core.gui.components.Window.dispatchRequest(Window.java:536)
   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.AuthenticatedDispatcher.processValidDispatchURI(AuthenticatedDispatcher.java:245)
   at org.olat.dispatcher.AuthenticatedDispatcher.execute(AuthenticatedDispatcher.java:201)
   at org.olat.core.servlets.OpenOLATServlet.executeUserRequest(OpenOLATServlet.java:280)
   at org.olat.core.servlets.OpenOLATServlet.doPost(OpenOLATServlet.java:223)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
>>> stack of 2.cause::javax.persistence.NoResultException: No entity found for query
-> at org.hibernate.jpa.internal.QueryImpl.getSingleResult(QueryImpl.java:498)
   at org.olat.repository.RepositoryManager.loadForUpdate(RepositoryManager.java:626)
   at org.olat.repository.RepositoryManager.setDescriptionAndName(RepositoryManager.java:757)
   at org.olat.repository.ui.author.RepositoryEditDescriptionController.formOK(RepositoryEditDescriptionController.java:552)
   at org.olat.core.gui.components.form.flexible.impl.FormBasicController.event(FormBasicController.java:367)
   at org.olat.core.gui.control.DefaultController.dispatchEvent(DefaultController.java:202)
   at org.olat.core.gui.components.AbstractComponent$1.run(AbstractComponent.java:240)
   at org.olat.core.logging.activity.ThreadLocalUserActivityLoggerInstaller.runWithUserActivityLogger(ThreadLocalUserActivityLoggerInstaller.java:108)
   at org.olat.core.gui.components.AbstractComponent.fireEvent(AbstractComponent.java:238)
   at org.olat.core.gui.components.form.flexible.impl.FormWrapperContainer.fireValidation(FormWrapperContainer.java:122)
   at org.olat.core.gui.components.form.flexible.impl.Form.submit(Form.java:500)