Ensure when undoing the deletion of the RecastNavMesh - Top Down project

UE4Editor_Engine!UNavigationSystem::RegisterNavData() navigationsystem.cpp:1885 
UE4Editor_Engine!UNavigationSystem::ProcessRegistrationCandidates() navigationsystem.cpp:1762 
UE4Editor_Engine!TBaseUObjectMethodDelegateInstance<0,UNavigationSystem,void __cdecl() delegateinstancesimpl.h:858 
UE4Editor_Engine!TGraphTask<FSimpleDelegateGraphTask>::ExecuteTask() taskgraphinterfaces.h:883 
UE4Editor_Core!FNamedTaskThread::ProcessTasksNamedThread() taskgraph.cpp:954 
UE4Editor_Core!FNamedTaskThread::ProcessTasksUntilQuit() taskgraph.cpp:701 
UE4Editor_Core!FTaskGraphImplementation::WaitUntilTasksComplete() taskgraph.cpp:1809 
UE4Editor_RenderCore!FTaskGraphInterface::WaitUntilTaskCompletes() taskgraphinterfaces.h:331 
UE4Editor_RenderCore!FSuspendRenderingThread::FSuspendRenderingThread() renderingthread.cpp:129 
UE4Editor_D3D11RHI!FD3D11DynamicRHI::InitD3DDevice() windowsd3d11device.cpp:820 
UE4Editor_D3D11RHI!FD3D11Viewport::FD3D11Viewport() windowsd3d11viewport.cpp:39 
UE4Editor_D3D11RHI!FD3D11DynamicRHI::RHICreateViewport() d3d11viewport.cpp:488 
UE4Editor_SlateRHIRenderer!RHICreateViewport() dynamicrhi.h:1470 
UE4Editor_SlateRHIRenderer!FSlateRHIRenderer::CreateViewport() slaterhirenderer.cpp:331 
UE4Editor_SlateCore!SWindow::ShowWindow() swindow.cpp:1224 
UE4Editor_Slate!FSlateApplication::AddWindowAsNativeChild() slateapplication.cpp:2101 
UE4Editor_Slate!FSlateNotificationManager::CreateStackForArea() notificationmanager.cpp:101 
UE4Editor_Slate!FSlateNotificationManager::AddNotification() notificationmanager.cpp:145 
UE4Editor_UnrealEd!UEditorEngine::ShowUndoRedoNotification() editorserver.cpp:1168 
UE4Editor_UnrealEd!UEditorEngine::HandleTransactorUndo() editorserver.cpp:1223 
UE4Editor_UnrealEd!TBaseUObjectMethodDelegateInstance<0,UEditorEngine,TTypeWrapper<void> __cdecl() delegateinstancesimpl.h:766 
UE4Editor_UnrealEd!TBaseUObjectMethodDelegateInstance<0,UEditorEngine,void __cdecl() delegateinstancesimpl.h:856 
UE4Editor_UnrealEd!TBaseMulticastDelegate<void,FUndoSessionContext,bool>::Broadcast() delegatesignatureimpl.inl:937 
UE4Editor_UnrealEd!UTransBuffer::Undo() editortransaction.cpp:866 
UE4Editor_UnrealEd!UEditorEngine::Exec_Transaction() editorserver.cpp:5198 
UE4Editor_UnrealEd!UEditorEngine::Exec() editorserver.cpp:5645 
UE4Editor_UnrealEd!UUnrealEdEngine::Exec() unrealedsrv.cpp:670 
UE4Editor_MainFrame!FMainFrameActionCallbacks::ExecuteExecCommand() mainframeactions.cpp:969 
UE4Editor_MainFrame!TBaseStaticDelegateInstance<void __cdecl() delegateinstancesimpl.h:1027 
UE4Editor_Slate!FUICommandList::ConditionalProcessCommandBindings() uicommandlist.cpp:216 
UE4Editor_Slate!FUICommandList::ProcessCommandBindings() uicommandlist.cpp:160 
UE4Editor_MainFrame!FMainFrameActionCallbacks::OnUnhandledKeyDownEvent() mainframeactions.cpp:211 
UE4Editor_MainFrame!UE4Tuple_Private::TTupleImpl<TIntegerSequence<unsigned int> >::ApplyAfter<FReply() tuple.h:497 
UE4Editor_MainFrame!TBaseStaticDelegateInstance<FReply __cdecl() delegateinstancesimpl.h:958 
UE4Editor_Slate!TBaseDelegate<FReply,FKeyEvent const & __ptr64>::Execute() delegatesignatureimpl.inl:537 
UE4Editor_Slate!FSlateApplication::ProcessKeyDownEvent() slateapplication.cpp:4641 
UE4Editor_Slate!FSlateApplication::OnKeyDown() slateapplication.cpp:4541 
UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage() windowsapplication.cpp:1539 
UE4Editor_Core!FWindowsApplication::DeferMessage() windowsapplication.cpp:2127 
UE4Editor_Core!FWindowsApplication::ProcessMessage() windowsapplication.cpp:867 
UE4Editor_Core!FWindowsApplication::AppWndProc() windowsapplication.cpp:714 
user32!<Unknown> 
user32!<Unknown> 
UE4Editor_Core!FWindowsPlatformMisc::PumpMessages() windowsplatformmisc.cpp:1009 
UE4Editor!FEngineLoop::Tick() launchengineloop.cpp:3058 
UE4Editor!GuardedMain() launch.cpp:166 
UE4Editor!GuardedMainWrapper() launchwindows.cpp:134 
UE4Editor!WinMain() launchwindows.cpp:210 
UE4Editor!__scrt_common_main_seh() exe_common.inl:253 
kernel32!<Unknown> 
ntdll!<Unknown>