Unreal continues to crash over and over

Any help please? I’m editing a sequence in UE4.26.2, every time I save it continues to crash. Not a heavy level by any means. I have the Stephane Metahuman as a main character and I’ve swapped clothes on him.

Windows, 128GB ram, 3090, i9 10900K

Assertion failed: UIDToArrayIndexLookupTable.Num() == InContext.Curve.UIDToArrayIndexLUT->Num() [File:D:/Build/++UE4/Sync/Engine/Source/Runtime/Engine/Private/Animation/AnimInstanceProxy.cpp] [Line: 2631]

UE4Editor_Core
UE4Editor_Core
UE4Editor_Engine
UE4Editor_Engine
UE4Editor_Engine
UE4Editor_Engine
UE4Editor_MovieSceneTracks
UE4Editor_MovieScene
UE4Editor_MovieScene
UE4Editor_MovieScene
UE4Editor_Sequencer
UE4Editor_Sequencer
UE4Editor_Sequencer
UE4Editor_Sequencer
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_AssetTools
UE4Editor_ContentBrowser
UE4Editor_ContentBrowser
UE4Editor_Slate
UE4Editor_Slate
UE4Editor_Slate
UE4Editor_Slate
UE4Editor_Slate
UE4Editor_Slate
UE4Editor_ApplicationCore
UE4Editor_ApplicationCore
UE4Editor_ApplicationCore
UE4Editor_ApplicationCore
user32
user32
UE4Editor_ApplicationCore
UE4Editor
UE4Editor
UE4Editor
UE4Editor
UE4Editor
kernel32
ntdll