RS editing course with none conform display option

2018-01-25 13:21:37,099 [ajp-nio2-8009-exec-7] ERROR AssertException - OLAT::ERROR ^%^ N1-E105 

https://www.xyz.de/auth/RepositoryEntry/9011385/CourseNode/88319138876033
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:57.0) Gecko/20100101 Firefox/57.0
**RedScreen** could not set <course_desc> to true because key was not found!

<dispatchinfo>
	<componentinfo>
		<compname>edit.cmd</compname>
		<compclass>org.olat.core.gui.components.link.Link</compclass>
		<extendedinfo>n/a</extendedinfo>
		<event>
			<class&gt;org.olat.core.gui.control.Event</class&gt;
			<command>edit.cmd</command>
			<tostring>com:edit.cmd,org.olat.core.gui.control.Event@5f6bc375</tostring>
		</event>
	</componentinfo>
	<controllerinfo>
		<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: could not set <course_desc> to true because key was not found!
-> at org.olat.core.gui.components.form.flexible.impl.elements.SelectboxSelectionImpl.select(SelectboxSelectionImpl.java:197)
   at org.olat.course.editor.NodeConfigFormController.initForm(NodeConfigFormController.java:164)
   at org.olat.core.gui.components.form.flexible.impl.FormBasicController.initForm(FormBasicController.java:273)
   at org.olat.course.editor.NodeConfigFormController.<init>(NodeConfigFormController.java:99)
   at org.olat.course.editor.NodeEditController.<init>(NodeEditController.java:130)
   at org.olat.course.nodes.STCourseNode.createEditController(STCourseNode.java:134)
   at org.olat.course.editor.EditorMainController.initNodeEditor(EditorMainController.java:523)
   at org.olat.course.editor.EditorMainController.updateViewForSelectedNodeId(EditorMainController.java:502)
   at org.olat.course.editor.EditorMainController.<init>(EditorMainController.java:325)
   at org.olat.course.CourseFactory.createEditorController(CourseFactory.java:189)
   at org.olat.course.run.CourseRuntimeController.doEdit(CourseRuntimeController.java:1214)
>>> stack of 2.cause::java.lang.Exception: assertionstackgenerator
-> at org.olat.core.logging.AssertException.<init>(AssertException.java:53)
   at org.olat.core.gui.components.form.flexible.impl.elements.SelectboxSelectionImpl.select(SelectboxSelectionImpl.java:197)
   at org.olat.course.editor.NodeConfigFormController.initForm(NodeConfigFormController.java:164)
   at org.olat.core.gui.components.form.flexible.impl.FormBasicController.initForm(FormBasicController.java:273)
   at org.olat.course.editor.NodeConfigFormController.<init>(NodeConfigFormController.java:99)
   at org.olat.course.editor.NodeEditController.<init>(NodeEditController.java:130)
   at org.olat.course.nodes.STCourseNode.createEditController(STCourseNode.java:134)
   at org.olat.course.editor.EditorMainController.initNodeEditor(EditorMainController.java:523)
   at org.olat.course.editor.EditorMainController.updateViewForSelectedNodeId(EditorMainController.java:502)
   at org.olat.course.editor.EditorMainController.<init>(EditorMainController.java:325)
   at org.olat.course.CourseFactory.createEditorController(CourseFactory.java:189)