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org.eclipse.emf.ecore.change.impl.ChangeDescriptionImpl cannot be cast to org.yakindu.sct.model.sgraph.Vertex
java.lang.ClassCastException: org.eclipse.emf.ecore.change.impl.ChangeDescriptionImpl cannot be cast to org.yakindu.sct.model.sgraph.Vertex	at org.yakindu.sct.ui.editor.providers.TransitionPriorityDecorationProvider$PriorityDecorator.deactivate(TransitionPriorityDecorationProvider.java:112)	at org.eclipse.gmf.runtime.diagram.ui.editpolicies.DecorationEditPolicy.deactivate(DecorationEditPolicy.java:221)	at org.eclipse.gef.editparts.AbstractEditPart.deactivateEditPolicies(AbstractEditPart.java:307)	at org.eclipse.gef.editparts.AbstractEditPart.deactivate(AbstractEditPart.java:295)	at org.eclipse.gef.editparts.AbstractGraphicalEditPart.deactivate(AbstractGraphicalEditPart.java:354)	at org.eclipse.gmf.runtime.diagram.ui.editparts.ConnectionEditPart.deactivate(ConnectionEditPart.java:383)	at org.eclipse.gef.editparts.AbstractGraphicalEditPart.deactivate(AbstractGraphicalEditPart.java:352)	at org.eclipse.gmf.runtime.diagram.ui.editparts.GraphicalEditPart.deactivate(GraphicalEditPart.java:315)	at org.eclipse.gef.editparts.AbstractEditPart.removeChild(AbstractEditPart.java:879)	at org.eclipse.gef.editparts.AbstractEditPart.refreshChildren(AbstractEditPart.java:793)	at org.eclipse.gmf.runtime.diagram.ui.editparts.GraphicalEditPart.handleNotificationEvent(GraphicalEditPart.java:1464)	at org.eclipse.gmf.runtime.diagram.ui.editparts.ResizableCompartmentEditPart.handleNotificationEvent(ResizableCompartmentEditPart.java:156)	at org.eclipse.gmf.runtime.diagram.ui.editparts.ShapeCompartmentEditPart.handleNotificationEvent(ShapeCompartmentEditPart.java:581)	at org.eclipse.gmf.runtime.diagram.ui.editparts.GraphicalEditPart.notifyChanged(GraphicalEditPart.java:1438)	at org.eclipse.gmf.runtime.diagram.core.listener.DiagramEventBroker.fireNotification(DiagramEventBroker.java:504)	at org.eclipse.gmf.runtime.diagram.core.listener.DiagramEventBroker.resourceSetChanged(DiagramEventBroker.java:399)	at org.eclipse.gmf.runtime.diagram.ui.DiagramEventBrokerThreadSafe.resourceSetChanged(DiagramEventBrokerThreadSafe.java:73)	at org.eclipse.gmf.runtime.diagram.core.DiagramEditingDomainFactory$DiagramEditingDomain.postcommit(DiagramEditingDomainFactory.java:214)	at org.eclipse.emf.transaction.impl.TransactionalEditingDomainImpl.deactivate(TransactionalEditingDomainImpl.java:543)	at org.eclipse.emf.transaction.impl.TransactionImpl.close(TransactionImpl.java:712)	at org.eclipse.emf.transaction.impl.TransactionImpl.commit(TransactionImpl.java:474)	at org.eclipse.emf.workspace.AbstractEMFOperation.redo(AbstractEMFOperation.java:463)	at org.eclipse.gmf.runtime.diagram.ui.commands.ICommandProxy.redo(ICommandProxy.java:81)	at org.eclipse.gef.commands.CompoundCommand.redo(CompoundCommand.java:176)	at org.eclipse.gmf.runtime.diagram.ui.commands.CommandProxy.doRedoWithResult(CommandProxy.java:58)	at org.eclipse.gmf.runtime.common.core.command.AbstractCommand.redo(AbstractCommand.java:175)	at org.eclipse.core.commands.operations.DefaultOperationHistory.doRedo(DefaultOperationHistory.java:340)	at org.eclipse.core.commands.operations.DefaultOperationHistory.redo(DefaultOperationHistory.java:1014)	at org.eclipse.ui.operations.RedoActionHandler.runCommand(RedoActionHandler.java:86)	at org.eclipse.ui.operations.OperationHistoryActionHandler$1.run(OperationHistoryActionHandler.java:308)	at org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:437)	at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:353)	at org.eclipse.jface.dialogs.ProgressMonitorDialog.run(ProgressMonitorDialog.java:481)	at org.eclipse.ui.internal.operations.TimeTriggeredProgressMonitorDialog.access$6(TimeTriggeredProgressMonitorDialog.java:1)	at org.eclipse.ui.internal.operations.TimeTriggeredProgressMonitorDialog$2.run(TimeTriggeredProgressMonitorDialog.java:163)	at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)	at org.eclipse.ui.internal.operations.TimeTriggeredProgressMonitorDialog.run(TimeTriggeredProgressMonitorDialog.java:176)	at org.eclipse.ui.operations.OperationHistoryActionHandler.run(OperationHistoryActionHandler.java:323)	at org.eclipse.gmf.runtime.common.ui.action.actions.global.GlobalRedoAction.doRun(GlobalRedoAction.java:244)	at org.eclipse.gmf.runtime.common.ui.action.AbstractActionHandler.run(AbstractActionHandler.java:359)	at org.eclipse.gmf.runtime.common.ui.action.ActionManager.run(ActionManager.java:229)	at org.eclipse.gmf.runtime.common.ui.action.AbstractActionHandler.runWithEvent(AbstractActionHandler.java:377)	at org.eclipse.jface.commands.ActionHandler.execute(ActionHandler.java:118)	at org.eclipse.ui.internal.handlers.E4HandlerProxy.execute(E4HandlerProxy.java:90)	at sun.reflect.GeneratedMethodAccessor84.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)	at java.lang.reflect.Method.invoke(Unknown Source)	at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:54)	at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:282)	at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:264)	at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:132)	at org.eclipse.e4.core.commands.internal.HandlerServiceHandler.execute(HandlerServiceHandler.java:152)	at org.eclipse.core.commands.Command.executeWithChecks(Command.java:494)	at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:488)	at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:210)	at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.executeCommand(KeyBindingDispatcher.java:286)	at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.press(KeyBindingDispatcher.java:507)	at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.processKeyEvent(KeyBindingDispatcher.java:558)	at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.filterKeySequenceBindings(KeyBindingDispatcher.java:378)	at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.access$0(KeyBindingDispatcher.java:324)	at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher$KeyDownFilter.handleEvent(KeyBindingDispatcher.java:86)	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)	at org.eclipse.swt.widgets.Display.filterEvent(Display.java:1270)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1078)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1103)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1088)	at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1130)	at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1126)	at org.eclipse.swt.widgets.Widget.wmChar(Widget.java:1547)	at org.eclipse.swt.widgets.Control.WM_CHAR(Control.java:4910)	at org.eclipse.swt.widgets.Canvas.WM_CHAR(Canvas.java:364)	at org.eclipse.swt.widgets.Control.windowProc(Control.java:4791)	at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:359)	at org.eclipse.swt.widgets.Display.windowProc(Display.java:5102)	at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method)	at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:2552)	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3814)	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1121)	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1022)	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:150)	at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:687)	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:604)	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:148)	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:138)	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:388)	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:243)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)	at java.lang.reflect.Method.invoke(Unknown Source)	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:673)	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:610)	at org.eclipse.equinox.launcher.Main.run(Main.java:1519)