"packages" error when doing update-package in vs 2015

Question

When i run the command

Update-Package <packagename> -version <packageversion> -IgnoreDependencies -IncludePreRelease -FileConflictAction Overwrite

I get the error

Attempting to gather dependency information for multiple packages with respect to project 'someproject', targeting '.NETFramework,Version=v4.6.1'
Attempting to resolve dependencies for multiple packages.
Resolving actions install multiple packages
Update-Package : packages
At line:1 char:15
+ Update-Package <<<<  <packagename> -version <packageversion> -IgnoreDependencies -IncludePreRelease -FileConflictAction Overwrite
    + CategoryInfo          : NotSpecified: (:) [Update-Package], Exception
    + FullyQualifiedErrorId : NuGetCmdletUnhandledException,NuGet.PackageManagement.PowerShellCmdlets.UpdatePackageCommand

What does Update-Package : packages mean?

I am working in visual studio 2015 with nuget package manager 3.4.4

Answer 1

There is a problem #1996 in NuGet which happens during package update. Seems your packages message problem is the other reincarnation of this known problem.

According to the NuGet sources something wrong with PackageIdentity.