title: Downgrade SSRS from 2016 to 2008
body: <p>We have 2 environments at work 
  one for SSRS 2016 and another for 2008</p>
  
  <p>mistakenly I open one of 2008 reports in VS2016
  now I cannot open it in 2008</p>
  
  <p>how can I downgrade an SSRS report opened in 2016 back to 2008?</p>