I upgraded my site to CiviCRM 5.4.0 on Drupal 7.5.9. When I went to run the database update, I got this message.
As far as I can tell, there are no message templates by those names. Even if there were, I wouldn't know what I am supposed to do with them. The link for detailed instructions goes to the CiviCRM documentation's Message Templates page and that page does not discuss this scenario.