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Single map crash Serial size error on one mesh

I have aproject with several working levels. one night after saving, I shut down my computer and the computer itself said there was an error shutting off.
The next day, I tried opening the project, and unreal editor crashed with this message:

EpicAccountId:575ce7cde8ab4421a85441d57a1f9eec

Fatal error: [File:D:/Build/++UE4/Sync/Engine/Source/Runtime/CoreUObject/Private/UObject/LinkerLoad.cpp] [Line: 4262] StaticMeshComponent /Game/Maps/CyberNFT.CyberNFT:PersistentLevel.ground7.StaticMeshComponent0: Serial size mismatch: Got 3487209, Expected 1145415

UE4Editor_CoreUObject
UE4Editor_CoreUObject
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UE4Editor_UnrealEd
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UE4Editor_UnrealEd
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UE4Editor_ContentBrowser
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UE4Editor_Slate
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user32
user32

There seems to be an issue with a static mesh called ground7. Prior to closing unreal the night before, the last thing I did was change the material on that particular static mesh.
I tried opening older saves of this map, but they all crash unreal. i don’t know much about the coding side, so any help would be appreciated. Thank you.