Startup Crash Assertion failed: NumPooled > 1

I’m working on a project that’s meant only for animation, So there’s no coding or anything going on, I saved and closed it a few hours to work on something but when I opened it again it has been crashing ever since, I made a new project and copied all the content without the Main.umap file it works fine but when I copy that one to the new project it starts crashing so i guess the problem is there, Someone Please help me !!

I’ve attached the crash reports and the Level file
and this is the error at the startup :

Assertion failed: NumPooled > 1 [File:D:\Build++UE4\Sync\Engine\Source\Runtime\D3D12RHI\Private\D3D12Allocation.h] [Line: 886]

UE4Editor_Core
UE4Editor_Core
UE4Editor_D3D12RHI
UE4Editor_D3D12RHI
UE4Editor_D3D12RHI
UE4Editor_D3D12RHI
UE4Editor_D3D12RHI
UE4Editor_D3D12RHI
UE4Editor_RenderCore
UE4Editor_Renderer
UE4Editor_RenderCore
UE4Editor_Renderer
UE4Editor_Renderer
UE4Editor_Core
UE4Editor_Core
UE4Editor_RenderCore
UE4Editor_RenderCore
UE4Editor_Core
UE4Editor_Core
kernel32
ntdll

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