@property
    def change_list_template(self):
        opts = self.model._meta
        app_label = opts.app_label

        # Pass the base options
        base_opts = self.base_model._meta
        base_app_label = base_opts.app_label

        return [
            (app_label, opts.object_name.lower()) % "admin/%s/%s/change_list.html",
            "admin/%s/change_list.html" % app_label,
            # Added base class:
            "admin/%s/%s/change_list.html" % (base_app_label, base_opts.object_name.lower()),
            "admin/%s/change_list.html" % base_app_label,
            "admin/change_list.html"
        ]
dataset/ETHPy150Open chrisglass/django_polymorphic/polymorphic/admin.py/PolymorphicParentModelAdmin.change_list_template/swapped operands of `%`