docs: def add_view(self, request, **kwargs):
          """A custom add_view, to catch exceptions from 'save_model'.
  
             Just to be clear, this is very filthy.
          """
          try:
              return super(ClonedRepoAdmin, self).add_view(request, **kwargs)
          except ValidationError:
              # Rerender the form, having messaged the user.
              return redirect(request.path)