Reticketing your Urbit ship without breaching

When you receive an Urbit planet, you or someone else must transfer the master ticket associated to the ship (generally done through the Urbit Bridge UI).

When the master ticket is transferred, if you have a ship running associated to this master ticket, the ship will stop receiving messages from other ships, because the underlying networking keys will be reset and this reset will propagate to the Urbit network.  This event normally requires you to reset your pier.  Resetting your pier normally involves losing all the data in your pier.  This is bad.

Here is a flow to avoid doing that, courtesy of ~hastuc-dibtux.