RS delete an open meeting room

2016-11-28 19:24:54,513 [ajp-nio2-8001-exec-9] ERROR DBRuntimeException - OLAT::ERROR ^%^ N1-E13 

https://learn.olat.com/auth/AdminSite/0/openmeetings/0
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_1) AppleWebKit/602.2.14 (KHTML, like Gecko) Version/10.0.1 Safari/602.2.14
**RedScreen** commit failed, rollback transaction

<dispatchinfo>
	<componentinfo>
		<compname>link_0</compname>
		<compclass>org.olat.core.gui.components.link.Link</compclass>
		<extendedinfo>n/a</extendedinfo>
		<event>	</event>
	</componentinfo>
	<controllerinfo>
		<controllername>org.olat.core.gui.control.generic.modal.DialogBoxController</controllername>
		<controllername>org.olat.modules.openmeetings.ui.OpenMeetingsAdminRoomsController</controllername>
		<controllername>org.olat.modules.openmeetings.ui.OpenMeetingsAdminController</controllername>
		<controllername>org.olat.admin.SystemAdminMainController</controllername>
		<controllername>org.olat.core.commons.fullWebApp.BaseFullWebappController</controllername>
	</controllerinfo>
</dispatchinfo>

>>> stack of 1.cause::org.olat.core.logging.DBRuntimeException: commit failed, rollback transaction
-> at org.olat.core.commons.persistence.DBImpl.commit(DBImpl.java:755)
   at org.olat.core.gui.components.Window.doDispatchToComponent(Window.java:1149)
   at org.olat.core.gui.components.Window.dispatchRequest(Window.java:357)
   at org.olat.core.gui.components.Window.doDispatchRequest(Window.java:241)
   at org.olat.core.gui.components.AbstractComponent.dispatchRequest(AbstractComponent.java:193)
   at org.olat.dispatcher.AuthenticatedDispatcher.processValidDispatchURI(AuthenticatedDispatcher.java:275)
   at org.olat.dispatcher.AuthenticatedDispatcher.execute(AuthenticatedDispatcher.java:192)
   at org.olat.core.servlets.OpenOLATServlet.executeUserRequest(OpenOLATServlet.java:292)
   at org.olat.core.servlets.OpenOLATServlet.doPost(OpenOLATServlet.java:235)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
   at org.olat.core.servlets.OpenOLATServlet.service(OpenOLATServlet.java:178)
>>> stack of 2.cause::org.olat.core.logging.DBRuntimeException: Try to commit a transaction in error status
-> at org.olat.core.commons.persistence.DBImpl.commit(DBImpl.java:719)
   at org.olat.core.gui.components.Window.doDispatchToComponent(Window.java:1149)
   at org.olat.core.gui.components.Window.dispatchRequest(Window.java:357)
   at org.olat.core.gui.components.Window.doDispatchRequest(Window.java:241)
   at org.olat.core.gui.components.AbstractComponent.dispatchRequest(AbstractComponent.java:193)
   at org.olat.dispatcher.AuthenticatedDispatcher.processValidDispatchURI(AuthenticatedDispatcher.java:275)
   at org.olat.dispatcher.AuthenticatedDispatcher.execute(AuthenticatedDispatcher.java:192)
   at org.olat.core.servlets.OpenOLATServlet.executeUserRequest(OpenOLATServlet.java:292)
   at org.olat.core.servlets.OpenOLATServlet.doPost(OpenOLATServlet.java:235)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
   at org.olat.core.servlets.OpenOLATServlet.service(OpenOLATServlet.java:178)
>>> stack of 3.cause::java.lang.Exception: olat_rtexception_stackgenerator
-> at org.olat.core.logging.OLATRuntimeException.<init>(OLATRuntimeException.java:57)
   at org.olat.core.logging.OLATRuntimeException.<init>(OLATRuntimeException.java:79)
   at org.olat.core.logging.DBRuntimeException.<init>(DBRuntimeException.java:44)
   at org.olat.core.commons.persistence.DBImpl.commit(DBImpl.java:719)
   at org.olat.core.gui.components.Window.doDispatchToComponent(Window.java:1149)
   at org.olat.core.gui.components.Window.dispatchRequest(Window.java:357)
   at org.olat.core.gui.components.Window.doDispatchRequest(Window.java:241)
   at org.olat.core.gui.components.AbstractComponent.dispatchRequest(AbstractComponent.java:193)
   at org.olat.dispatcher.AuthenticatedDispatcher.processValidDispatchURI(AuthenticatedDispatcher.java:275)
   at org.olat.dispatcher.AuthenticatedDispatcher.execute(AuthenticatedDispatcher.java:192)
   at org.olat.core.servlets.OpenOLATServlet.executeUserRequest(OpenOLATServlet.java:292)