'For `prepopulated_fields` equal to {"slug": ("title",)},
`field_name` is "title".'

def _check_prepopulated_fields_value_item(self, obj, model, field_name, label):

    try:
        model._meta.get_field(field_name)
    except FieldDoesNotExist:
        return refer_to_missing_field(field=field_name, option=label, model=model, obj=obj, id='admin.E030')
    else:
        return []
