This is a carry over from Vera 1 & the FindVera service. To ensure maximum compatibility we support both services, but what is happening is that FindVera is still reporting your device, even though you have upgraded. This will eventually stop, or you can ask MCV to purge the FindVera entry for your old system. That will stop it appearing.
In the meantime you can disable MiOS Discovery from within Settings (on your iOS device - not in the app). Then delete the old device from within the app… the new version that has been “Discovered” will remain.