Unable to change the types of the groups you have selected and the related groups. You might try deleting the groups you wish to change and placing or copy/pasting new groups of the desired type. 
   Namespace:   Autodesk.Revit.DB  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
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