An .net core console project "An assembly with the same identity has already been imported"

Question

I just created simple .net core console project using visual studio for mac. And the sdk is .NET Core 1.1 SDK. After I installed Microsoft.EntityFrameworkCore.sqlite successfully，it just show me 12 errors, saying "An assembly with the same identity has already been imported". But I still can't figure out which part should be removed. The errors is this:

Thanks！

Answer 1

Sorry for this dumb question, just following the error message and remove duplicate packages，and everything gonna be fine.