warning message "The element is not a view ! Do not delete !" when using "Manage Function Allocation" tool

[Kellindil]

• Create a new project
• Create a LAB and add a Logical Component LC1, then a Logical Function LF1 in that component
• Use the "Allocated Functions" tool on the component and remove LF1 from there

At this point, LF1 is not displayed in the diagram, but it is still allocated to LC1.

• Use the "Manage Function Allocation" tool on LC1 and remove LF1

A warning is displayed in the error log : "The element is not a view ! Do not delete !" with the stack trace below.

java.lang.IllegalArgumentException
at org.eclipse.sirius.business.internal.helper.task.operations.RemoveElementTask.execute(RemoveElementTask.java:80)
at org.eclipse.sirius.business.internal.helper.task.ExecuteToolOperationTask.executeTask(ExecuteToolOperationTask.java:119)
at org.eclipse.sirius.business.internal.helper.task.ExecuteToolOperationTask.executeTask(ExecuteToolOperationTask.java:126)
at org.eclipse.sirius.business.internal.helper.task.ExecuteToolOperationTask.executeTask(ExecuteToolOperationTask.java:126)
at org.eclipse.sirius.business.internal.helper.task.ExecuteToolOperationTask.execute(ExecuteToolOperationTask.java:108)
at org.eclipse.sirius.business.internal.helper.task.operations.ForTask.execute(ForTask.java:99)
at org.eclipse.sirius.business.internal.helper.task.ExecuteToolOperationTask.executeTask(ExecuteToolOperationTask.java:119)
at org.eclipse.sirius.business.internal.helper.task.ExecuteToolOperationTask.executeTask(ExecuteToolOperationTask.java:126)
at org.eclipse.sirius.business.internal.helper.task.ExecuteToolOperationTask.executeTask(ExecuteToolOperationTask.java:126)
at org.eclipse.sirius.business.internal.helper.task.ExecuteToolOperationTask.execute(ExecuteToolOperationTask.java:108)
at org.eclipse.sirius.business.api.helper.task.TaskExecutor.execute(TaskExecutor.java:66)
at org.eclipse.sirius.tools.api.command.SiriusCommand.doExecute(SiriusCommand.java:82)
at org.eclipse.emf.transaction.RecordingCommand.execute(RecordingCommand.java:135)
at org.eclipse.sirius.diagram.ui.tools.api.command.GMFCommandWrapper.doExecuteWithResult(GMFCommandWrapper.java:104)
at org.eclipse.gmf.runtime.emf.commands.core.command.AbstractTransactionalCommand.doExecute(AbstractTransactionalCommand.java:248)
at org.eclipse.emf.workspace.AbstractEMFOperation.execute(AbstractEMFOperation.java:150)
at org.eclipse.gmf.runtime.common.core.command.CompositeCommand.doExecuteWithResult(CompositeCommand.java:404)
at org.eclipse.gmf.runtime.common.core.command.AbstractCommand.execute(AbstractCommand.java:135)
at org.eclipse.sirius.diagram.ui.tools.internal.commands.WrappingCommandIgnoringAffectedFiles.execute(WrappingCommandIgnoringAffectedFiles.java:125)
at org.eclipse.core.commands.operations.DefaultOperationHistory.execute(DefaultOperationHistory.java:496)
at org.eclipse.sirius.diagram.ui.tools.internal.editor.DDiagramCommandStack.execute(DDiagramCommandStack.java:73)
at org.eclipse.sirius.diagram.ui.tools.internal.editor.DDiagramCommandStack.execute(DDiagramCommandStack.java:54)
at org.eclipse.gmf.runtime.diagram.ui.parts.DiagramCommandStack.execute(DiagramCommandStack.java:145)
at org.eclipse.gef.tools.AbstractTool.executeCommand(AbstractTool.java:407)
at org.eclipse.gef.tools.AbstractTool.executeCurrentCommand(AbstractTool.java:419)
at org.eclipse.gef.tools.CreationTool.performCreation(CreationTool.java:264)
at org.eclipse.gef.tools.CreationTool.handleButtonUp(CreationTool.java:185)
at org.eclipse.gef.tools.AbstractTool.mouseUp(AbstractTool.java:1140)
at org.eclipse.gef.EditDomain.mouseUp(EditDomain.java:277)
at org.eclipse.gef.ui.parts.DomainEventDispatcher.dispatchMouseReleased(DomainEventDispatcher.java:374)
at org.eclipse.draw2d.LightweightSystem$EventHandler.mouseUp(LightweightSystem.java:536)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:224)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4209)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1043)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4026)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3626)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1157)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1046)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:155)
at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:644)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:551)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:156)
at org.polarsys.capella.core.platform.sirius.ui.app.CapellaApplication.start(CapellaApplication.java:118)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203)
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:401)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:654)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:591)
at org.eclipse.equinox.launcher.Main.run(Main.java:1462)
at org.eclipse.equinox.launcher.Main.main(Main.java:1435)