I am having trouble trying to get the game project that I converted from 4.27.2 to upgrade convert from 5.0 to 5.1 ? it keeps saying that the some of the shooter game files were made with another engine and says rebuild from source ? even if I redownload the project shooter game and tried converting from the 4.27 it says the same, but when converting to 5.0 it does fine 
anyone who can help me? I keep getting this error Parsing headers for ShooterGameEditor
Running Internal UnrealHeaderTool “C:\Users\New Owner\Documents\Unreal Projects\UTAscension 5.1\UTAscension.uproject” “C:\Users\New Owner\Documents\Unreal Projects\UTAscension 5.1\Intermediate\Build\Win64\ShooterGameEditor\Development\ShooterGameEditor.uhtmanifest” -WarningsAsErrors -installed
C:\Users\New Owner\Documents\Unreal Projects\UTAscension 5.1\Source\ShooterGame\Public\Weapons\ShooterWeapon.h(326): Error: Unable to find ‘class’ with name ‘UMatineeCameraShake’ then it gives error ShooterGame and ShooterGameLoadingScreen needs rebuilt from source, I do not see why UE 5.0 has no problem in the conversion but UE 5.1 does 