follow the error code.
Fatal error: [File:D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\Serialization\AsyncLoading2.cpp] [Line: 1812]
ObjectSerializationError: /Game/Maps/FinalMap (0x9D12DD3B40EDFD0E) /Game/Maps/FinalMap (0x9D12DD3B40EDFD0E) - InstancedFoliageActor /Game/Maps/FinalMap.FinalMap:PersistentLevel.InstancedFoliageActor_0: Bad export index 1897555583/1539.
0x00007ff66b5724a5 RedHoodProject.exe!FExportArchive::HandleBadExportIndex()
0x00007ff66b55923f RedHoodProject.exe!FExportArchive::operator<<()
0x00007ff66b53fad0 RedHoodProject.exe!FArchiveUObject::SerializeObjectPtr()
0x00007ff66f586b1d RedHoodProject.exe!operator<<<TSetElement<TTuple<TObjectPtr,TUniqueObj > >,TSparseArrayAllocator<TSizedDefaultAllocator<32>,FDefaultBitArrayAllocator> >()
0x00007ff66f589cca RedHoodProject.exe!TSetPrivateFriend::Serialize<TTuple<TObjectPtr,TUniqueObj >,TDefaultMapHashableKeyFuncs<TObjectPtr,TUniqueObj,0>,FDefaultSetAllocator>()
0x00007ff66f596e1a RedHoodProject.exe!AInstancedFoliageActor::Serialize()
0x00007ff66b567a0a RedHoodProject.exe!FAsyncPackage2::EventDrivenSerializeExport()
0x00007ff66b56a6b0 RedHoodProject.exe!FAsyncPackage2::Event_ProcessExportBundle()
0x00007ff66b56b453 RedHoodProject.exe!FEventLoadNode2::Execute()
0x00007ff66b56ba0d RedHoodProject.exe!FAsyncLoadEventQueue2::ExecuteSyncLoadEvents()
0x00007ff66b5855cc RedHoodProject.exe!FAsyncLoadingThread2::Run()
0x00007ff66b1d4068 RedHoodProject.exe!FRunnableThreadWin::Run()
0x00007ff66b1c7bb7 RedHoodProject.exe!FRunnableThreadWin::GuardedRun()
0x00007ffb151b7344 KERNEL32.DLL!UnknownFunction
Crash in runnable thread FAsyncLoadingThread