Detected package downgrade warning (dotnet core, vs 2017)

Question

I have just updated all my nuget packages for my solution (dotnet core 1.1 project).

I am now getting the following warnings and I don\'t really know what they mean.

Answer 1

I was able to fix some error like that adding NoWarn in cproj

 
    $(NoWarn);NU1605
  

...

You may want to add it only temporarily during multiple package upgrade and remove it later.