5: Don't create a new instance with the same profile and URL. Other instances will still have URLs, @subscriptions, #tags, and !groups from the deleted instance, and will try to send messages to your server. Although the new instance will have the same URL it will have none of the database entries for the messages it receives. This may cause unintended effects on your server, as well as the other instances. It's better if they try to send to a completely non-existent instance and get back no response. PS. for @mmn and other developers: We really need a way to clean the database and avatar & files folders of data from dead instances; it