System.Reflection multiple assemblies error after update

After updating .NET Framework NuGet packages that my solution references to last prerelease version. I've got a building error:

Multiple assemblies with equivalent identity have been imported: 'C:\Projects\RP\packages\System.Reflection.4.1.0-beta-23516\lib\net46\System.Reflection.dll' and 'C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework.NETFramework\v4.6\Facades\System.Reflection.dll'. Remove one of the duplicate references.

I can't figure out how resolve this issue. If I remove System.Reflection using NuGet it throws reference error exception, it wants System.Reflection v.4.1.0.0.

Could not load file or assembly 'System.Reflection, Version=4.1.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.

How can I remove a duplicate?