Deleted Devices on ISY but still show on iPhone & iPad

I thought that running a "sync" would eliminate the errant entries in the system. How do I eliminate the obsolete devices that are no longer required.
A place to share information on the MobiLinc family of Home Automation Apps
https://mobilinc.com/utilities/forum/
https://mobilinc.com/utilities/forum/viewtopic.php?f=35&t=3322