I have two properties that use TP-Link's Kasa switches and plugs to control the lights in each house.  One location has 43 devices and the other has 72 devices.  The location with 72 devices has been sold.  

Both properties are controlled with one app.  I select the location I want to control by clicking the down arrow in the upper left-hand corner of the property's description.  

The existing Comcast modem will remain in place.  We were able to get that transferred to the new owner.

How can I remove the property with the 72 devices from my app?  Will the new owner be required to perform a factory reset on all devices and reinstall them?