java.lang.IllegalStateException: Current thread has already started a
transaction
	at
org.netbeans.modules.xml.xam.AbstractModel.startTransaction(AbstractModel.java:317)
	at
org.netbeans.modules.xml.xam.AbstractModel.startTransaction(AbstractModel.java:312)
	at
org.netbeans.modules.web.jsf.navigation.NavigationCaseNode.destroy(NavigationCaseNode.java:173)
[catch] at
org.netbeans.modules.web.jsf.navigation.graph.actions.MapActionUtility$HandleDeleteAction2$1.run(MapActionUtility.java:265)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:461)
	at
java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
	at
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
	at
java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
	at
java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)