https://www.dotnetzone.gr:443/cs/blogs/ppolyzos/archive/2016/05/12/reinstalling-nuget-packages.aspxThere are some scenarios where you might want to reinstall nuget packages in your projects, like for example: Project Retargeting or Upgrade This can be useful when a project has been retargeted or upgraded and if the package REQUIRES reinstallation dueenCommunityServer 2.1 SP3 (Build: 20423.1)