RS if the account manager property in project broker is duplicate

2016-04-23 01:17:41,092 [ajp-nio-8009-exec-10] ERROR AssertException - OLAT::ERROR ^%^ N1-E17 ^%^ org.olat.core.logging

https://f.xyz.de/auth/RepositoryEntry/2156986371/CourseNode/91620757473833/path%3D~~WLAN/0 ^%^ Mozilla/5.0 (Windows NT 6.1; WOW64; rv:45.0) Gecko/20100101 Firefox/45.0
**RedScreen** findProperty found more than one properties for identity::null, group::null, resourceable::Course:[93229996419732,Kryptologie SS 16 (Prof. Dr. Neiße)], org.olat.course.PersistingCourseImpl@4d995d88, category::NID:proj::91620757464733, name::config_accountmanager_group_id

<dispatchinfo>
	<componentinfo>
		<compname>luTreeRun</compname>
		<compclass>org.olat.core.gui.components.tree.MenuTree</compclass>
		<extendedinfo>n/a</extendedinfo>
		<event>
			<class&gt;org.olat.core.gui.components.tree.TreeEvent</class&gt;
			<command>ctncl</command>
			<tostring>TreeEvent:{cmd:ctncl, nodeid:91620757464733}</tostring>
		</event>
	</componentinfo>
	<controllerinfo>
		<controllername>org.olat.course.run.RunMainController</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.AssertException: findProperty found more than one properties for identity::null, group::null, resourceable::Course:[93229996419732,Kryptologie SS 16 (Prof. Dr. Neiße)], org.olat.course.PersistingCourseImpl@4d995d88, category::NID:proj::91620757464733, name::config_accountmanager_group_id
-> at org.olat.properties.PropertyManager.findProperty(PropertyManager.java:598)
   at org.olat.properties.NarrowedPropertyManager.findProperty(NarrowedPropertyManager.java:150)
   at org.olat.course.properties.PersistingCoursePropertyManager.findCourseNodeProperty(PersistingCoursePropertyManager.java:152)
   at org.olat.course.nodes.projectbroker.service.ProjectGroupManagerImpl.isAccountManager(ProjectGroupManagerImpl.java:140)
   at org.olat.course.nodes.projectbroker.ProjectListController.<init>(ProjectListController.java:157)
   at org.olat.course.nodes.projectbroker.ProjectBrokerControllerFactory.createRunController(ProjectBrokerControllerFactory.java:49)
   at org.olat.course.nodes.ProjectBrokerCourseNode.createNodeRunConstructionResult(ProjectBrokerCourseNode.java:229)
   at org.olat.course.run.navigation.NavigationHandler.doEvaluateJumpTo(NavigationHandler.java:437)
   at org.olat.course.run.navigation.NavigationHandler.evaluateJumpToTreeNode(NavigationHandler.java:272)
   at org.olat.course.run.RunMainController.doNodeClick(RunMainController.java:629)
   at org.olat.course.run.RunMainController.event(RunMainController.java:490)
>>> stack of 2.cause::java.lang.Exception: assertionstackgenerator
-> at org.olat.core.logging.AssertException.<init>(AssertException.java:53)
   at org.olat.properties.PropertyManager.findProperty(PropertyManager.java:598)
   at org.olat.properties.NarrowedPropertyManager.findProperty(NarrowedPropertyManager.java:150)
   at org.olat.course.properties.PersistingCoursePropertyManager.findCourseNodeProperty(PersistingCoursePropertyManager.java:152)
   at org.olat.course.nodes.projectbroker.service.ProjectGroupManagerImpl.isAccountManager(ProjectGroupManagerImpl.java:140)
   at org.olat.course.nodes.projectbroker.ProjectListController.<init>(ProjectListController.java:157)
   at org.olat.course.nodes.projectbroker.ProjectBrokerControllerFactory.createRunController(ProjectBrokerControllerFactory.java:49)
   at org.olat.course.nodes.ProjectBrokerCourseNode.createNodeRunConstructionResult(ProjectBrokerCourseNode.java:229)
   at org.olat.course.run.navigation.NavigationHandler.doEvaluateJumpTo(NavigationHandler.java:437)
   at org.olat.course.run.navigation.NavigationHandler.evaluateJumpToTreeNode(NavigationHandler.java:272)
   at org.olat.course.run.RunMainController.doNodeClick(RunMainController.java:629)