VisualStudioVersion in SLN and Git

Hi,

we are working in a team and share our code over git. The problem is, if one team member installs update 2 for VS2015 and the other members have only Update 1 every time VS changes the VisualStudioVersion-Field in the Sln-File.  Switching branches causes visual studio to bring up a message that uncommited changes exists.

Somebody knows a way that VS doesn't update the VisualStudioVersion-Field?

Thank you!