[CrashReport] UE4Editor_Engine!FStaticMeshRenderData::AllocateLODResources() [staticmesh.cpp:775]

  771       void FStaticMeshRenderData::AllocateLODResources(int32 NumLODs)
  772       {
  773       	check(LODResources.Num() == 0);
  774 ***** 	while (LODResources.Num() < NumLODs)
  775       	{
  776       		new(LODResources) FStaticMeshLODResources;
  777       		new(LODVertexFactories) FStaticMeshVertexFactories(ERHIFeatureLevel::Num);
  778       	}
  779       }

Assertion failed: LODResources.Num() == 0 [File:D:\Build\++UE4+Release-4.19+Compile\Sync\Engine\Source\Runtime\Engine\Private\StaticMesh.cpp] [Line: 774]

UE4Editor_Engine!FStaticMeshRenderData::AllocateLODResources() [staticmesh.cpp:775]
UE4Editor_MeshUtilities!FStaticMeshUtilityBuilder::GenerateRenderingMeshes() [meshutilities.cpp:3039]
UE4Editor_MeshUtilities!FMeshUtilities::BuildStaticMesh() [meshutilities.cpp:3317]
UE4Editor_Engine!FStaticMeshRenderData::Cache() [staticmesh.cpp:1414]
UE4Editor_Engine!UStaticMesh::CacheDerivedData() [staticmesh.cpp:2308]
UE4Editor_Engine!UStaticMesh::Build() [staticmeshbuild.cpp:121]
UE4Editor_Engine!UStaticMesh::PostEditChangeProperty() [staticmesh.cpp:1886]
UE4Editor_CoreUObject!UObject::PostEditChangeChainProperty() [obj.cpp:436]
UE4Editor_PropertyEditor!FPropertyNode::NotifyPostChange() [propertynode.cpp:2393]
UE4Editor_PropertyEditor!FPropertyValueImpl::ImportText() [propertyhandleimpl.cpp:570]
UE4Editor_PropertyEditor!FPropertyValueImpl::ImportText() [propertyhandleimpl.cpp:358]
UE4Editor_PropertyEditor!FPropertyHandleInt::SetValue() [propertyhandleimpl.cpp:3400]
UE4Editor_PropertyEditor!SPropertyEditorNumeric<int>::OnValueCommitted() [spropertyeditornumeric.h:506]
UE4Editor_PropertyEditor!TBaseSPMethodDelegateInstance<0,SPropertyEditorNumeric<int>,0,TTypeWrapper<void> __cdecl() [delegateinstancesimpl.h:269]
UE4Editor_PropertyEditor!TBaseSPMethodDelegateInstance<0,SPropertyEditorNumeric<int>,0,void __cdecl() [delegateinstancesimpl.h:345]
UE4Editor_PropertyEditor!SSpinBox<int>::CommitValue() [sspinbox.h:865]
UE4Editor_PropertyEditor!SSpinBox<int>::TextField_OnTextCommitted() [sspinbox.h:791]
UE4Editor_PropertyEditor!TBaseSPMethodDelegateInstance<0,SSpinBox<int>,0,TTypeWrapper<void> __cdecl() [delegateinstancesimpl.h:269]
UE4Editor_PropertyEditor!TBaseSPMethodDelegateInstance<0,SSpinBox<int>,0,void __cdecl() [delegateinstancesimpl.h:345]
UE4Editor_Slate!FSlateEditableTextLayout::HandleCarriageReturn() [slateeditabletextlayout.cpp:1450]
UE4Editor_Slate!FSlateEditableTextLayout::HandleKeyDown() [slateeditabletextlayout.cpp:923]
UE4Editor_Slate!SEditableText::OnKeyDown() [seditabletext.cpp:203]
UE4Editor_Slate!<lambda_2afcd964c763e269e2d1a63f3a72f846>::operator() [slateapplication.cpp:5011]
UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FBubblePolicy,FKeyEvent,<lambda_2afcd964c763e269e2d1a63f3a72f846> >() [slateapplication.cpp:266]
UE4Editor_Slate!FEventRouter::RouteAlongFocusPath<FEventRouter::FBubblePolicy,<lambda_2afcd964c763e269e2d1a63f3a72f846>,FKeyEvent>() [slateapplication.cpp:247]
UE4Editor_Slate!FSlateApplication::ProcessKeyDownEvent() [slateapplication.cpp:5009]
UE4Editor_Slate!FSlateApplication::OnKeyDown() [slateapplication.cpp:4921]
UE4Editor_ApplicationCore!FWindowsApplication::ProcessDeferredMessage() [windowsapplication.cpp:1561]
UE4Editor_ApplicationCore!FWindowsApplication::DeferMessage() [windowsapplication.cpp:2172]
UE4Editor_ApplicationCore!FWindowsApplication::ProcessMessage() [windowsapplication.cpp:889]
UE4Editor_ApplicationCore!FWindowsApplication::AppWndProc() [windowsapplication.cpp:726]
user32!UserCallWinProcCheckWow()
user32!DispatchMessageWorker()
UE4Editor_ApplicationCore!FWindowsPlatformApplicationMisc::PumpMessages() [windowsplatformapplicationmisc.cpp:129]
UE4Editor!FEngineLoop::Tick() [launchengineloop.cpp:3263]
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!BaseThreadInitThunk()
ntdll!RtlUserThreadStart()