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Migrate unity project from unity 2017.1 to unity 2017.3

error CS1704: An assembly with the same name `Vuforia.UnityExtensions.Editor' has already been imported. Consider removing one of the references or sign the assembly C:/Program Files/Unity/Editor/Data/PlaybackEngines/VuforiaSupport/Managed/Editor/Vuforia.UnityExtensions.Editor.dll (Location of the symbol related to previous error) Assets/Vuforia/Editor/Scripts/Vuforia.UnityExtensions.Editor.dll (Location of the symbol related to previous error) error CS1704: An assembly with the same name `Vuforia.UnityExtensions' has already been imported. Consider removing one of the references or sign the assembly C:/Program Files/Unity/Editor/Data/PlaybackEngines/VuforiaSupport/Managed/Runtime/Vuforia.UnityExtensions.dll (Location of the symbol related to previous error) Assets/Vuforia/Scripts/Internal/Vuforia.UnityExtensions.dll (Location of the symbol related to previous error)

Compilation failed: 2 error(s), 0 warnings

 

This error appear when i export unity 2017.1 project in unity 2017.3. How to fix it? 

I'd recommend reviewing this article: https://library.vuforia.com/articles/Solution/migrate-vuforia-62-to-65.html

Thanks,

Vuforia Support