Crash on paste of subcategory in the details panel

1. Run the testprops command
2. Right click on Foo
3. Click copy all properties in category
4. Right click on Foo
5. Click paste all properties in Category

Expected result: properties paste to Category

Actual result: Crash with the following stacktrace

SDetailCategoryTableRow::OnPasteCategory() SDetailCategoryTableRow.cpp:435 TBaseSPMethodDelegateInstance<0,SDetailCategoryTableRow,1,void _cdecl(void),FDefaultDelegateUserPolicy>::ExecuteIfSafe() DelegateInstancesImpl.h:298 TDelegate<void __cdecl(void),FDefaultDelegateUserPolicy>::ExecuteIfBound<void,0>() DelegateSignatureImpl.inl:570 [Inlined] FUIAction::Execute() UIAction.h:139 SMenuEntryBlock::OnClicked(bool) SMenuEntryBlock.cpp:1163 SMenuEntryBlock::OnMenuItemButtonClicked() SMenuEntryBlock.cpp:1117 [Inlined] Invoke(FReply (SMenuEntryBlock::)(),SMenuEntryBlock *&) Invoke.h:66 [Inlined] UE::Core::Private::Tuple::TTupleBase<TIntegerSequence<unsigned int> >::ApplyAfter(FReply (SMenuEntryBlock::&)(),SMenuEntryBlock *&) Tuple.h:309 TBaseSPMethodDelegateInstance<0,SMenuEntryBlock,1,FReply __cdecl(void),FDefaultDelegateUserPolicy>::Execute() DelegateInstancesImpl.h:281 TDelegate<FReply __cdecl(void),FDefaultDelegateUserPolicy>::Execute() DelegateSignatureImpl.inl:549 SButton::ExecuteOnClick() SButton.cpp:465 SButton::OnMouseButtonUp(const FGeometry &,const FPointerEvent &) SButton.cpp:390 SMenuEntryButton::OnMouseButtonUp(const FGeometry &,const FPointerEvent &) SMenuEntryBlock.cpp:431 [Inlined] FSlateApplication::RoutePointerUpEvent::l8::<lambda_2>::operator()(const FArrangedWidget &,const FPointerEvent &) SlateApplication.cpp:5288 FEventRouter::Route<FReply,FEventRouter::FToLeafmostPolicy,FPointerEvent,`FSlateApplication::RoutePointerUpEvent'::`8'::<lambda_2> >(FSlateApplication *,FToLeafmostPolicy,FPointerEvent,const <lambda_2> &,ESlateDebuggingInputEvent) SlateApplication.cpp:442 FSlateApplication::RoutePointerUpEvent(const FWidgetPath &,const FPointerEvent &) SlateApplication.cpp:5274 FSlateApplication::ProcessMouseButtonUpEvent(const FPointerEvent &) SlateApplication.cpp:5843 FSlateApplication::OnMouseUp(Type,TVector2<double>) SlateApplication.cpp:5808 FWindowsApplication::ProcessDeferredMessage(const FDeferredWindowsMessage &) WindowsApplication.cpp:2236 FWindowsApplication::DeferMessage(TSharedPtr<FWindowsWindow,1> &,HWND_ *,unsigned int,unsigned long long,long long,int,int,unsigned int) WindowsApplication.cpp:2743 FWindowsApplication::ProcessMessage(HWND__ *,unsigned int,unsigned long long,long long) WindowsApplication.cpp:1912 [Inlined] WindowsApplication_WndProc(HWND__ *,unsigned int,unsigned long long,long long) WindowsApplication.cpp:923 FWindowsApplication::AppWndProc(HWND__ *,unsigned int,unsigned long long,long long) WindowsApplication.cpp:928 <unknown> 0x00007ffa3c53e858 <unknown> 0x00007ffa3c53e299 [Inlined] WinPumpMessages() WindowsPlatformApplicationMisc.cpp:116 FWindowsPlatformApplicationMisc::PumpMessages(bool) WindowsPlatformApplicationMisc.cpp:145 FEngineLoop::Tick() LaunchEngineLoop.cpp:5800 [Inlined] EngineTick() Launch.cpp:61 GuardedMain(const wchar_t *) Launch.cpp:182 LaunchWindowsStartup(HINSTANCE__ *,HINSTANCE__ *,char *,int,const wchar_t *) LaunchWindows.cpp:247 WinMain(HINSTANCE__ *,HINSTANCE__ *,char *,int) LaunchWindows.cpp:298 [Inlined] invoke_main() 0x00007ff67de9bb26 __scrt_common_main_seh() 0x00007ff67de9bb05 <unknown> 0x00007ffa3c7b7344 <unknown> 0x00007ffa3ca226b1