          """
          opts = self.model._meta
          if self.has_change_permission(request, None):
              post_url = reverse('admin:%s_%s_changelist' %
                                 (opts.app_label, opts.module_name),
                                 current_app=self.admin_site.name)
          else:
              post_url = reverse('admin:index',
                                 current_app=self.admin_site.name)
          return HttpResponseRedirect(post_url)
 
</s> remove                                (opts.app_label, opts.module_name),
 </s> add                                (opts.app_label, opts.model_name), </s> remove                                         (opts.app_label, opts.module_name),
 </s> add                                         (opts.app_label, opts.model_name), </s> remove                                             (opts.app_label, opts.module_name),
 </s> add                                             (opts.app_label, opts.model_name), </s> remove             opts.app_label, opts.object_name.lower(),
 </s> add             opts.app_label, opts.model_name, </s> remove                                     rel_to._meta.module_name),
 </s> add                                     rel_to._meta.model_name),
                               (opts.app_label, opts.model_name),
          """
          opts = self.model._meta
          if self.has_change_permission(request, None):
              post_url = reverse('admin:%s_%s_changelist' %
                               (opts.app_label, opts.model_name),
                                 current_app=self.admin_site.name)
          else:
              post_url = reverse('admin:index',
                                 current_app=self.admin_site.name)
          return HttpResponseRedirect(post_url)
keep keep keep keep replace keep keep keep keep keep
 Fixed #19689 -- Renamed `Model._meta.module_name` to `model_name`. 
django/contrib/admin/options.py