What happened?The VR sence i build can not open, shows crash

Please help, The scene I have worked on for over month. March 9 is the my show day.

I got home today, I cant open the scene, load up to 93% and then crash.

here is the report. Please anyone can help on this. Thanks in advance.

Fatal error: [File:D:\Build++UE4+Release-4.15+Compile\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp] [Line: 3498]
MapBuildDataRegistry /Game/StarterContent/Maps/test_BuiltData.test_BuiltData: Serial size mismatch: Got 87637798, Expected 87637798

KERNELBASE.dll!0x000000008C297788
UE4Editor-Core.dll!0x00000000510464DE
UE4Editor-Core.dll!0x0000000050E6CEDE
UE4Editor-Core.dll!0x0000000050DF2719
UE4Editor-CoreUObject.dll!0x00000000430AE47D
UE4Editor-CoreUObject.dll!0x00000000431709A6
UE4Editor-CoreUObject.dll!0x0000000043184970
UE4Editor-CoreUObject.dll!0x0000000043183E67
UE4Editor-UnrealEd.dll!0x000000003CBD2D37
UE4Editor-UnrealEd.dll!0x000000003CBC3A25
UE4Editor-UnrealEd.dll!0x000000003CBA93F3
UE4Editor-UnrealEd.dll!0x000000003D39A395
UE4Editor-UnrealEd.dll!0x000000003CE39AFB
UE4Editor-UnrealEd.dll!0x000000003CE39746
UE4Editor-UnrealEd.dll!0x000000003D34CA7E
UE4Editor-UnrealEd.dll!0x000000003D3103CD
UE4Editor.exe!0x0000000029C2EA36
UE4Editor.exe!0x0000000029C2EBBA
UE4Editor.exe!0x0000000029C40A29
UE4Editor.exe!0x0000000029C422B6
KERNEL32.DLL!0x000000008F5F8364
ntdll.dll!0x000000008F8A70D1
ntdll.dll!0x000000008F8A70D1

Sorry This is my log after crashlink text