No cheats. No edit mode in that save.
Taelon, IIRC, is a village for Qarthigar Ilyn Payne quest. Even when it's hidden, border accidents happen with it. In the message Taelon's faction is "No Faction"
Images:
https://imgur.com/a/WF2Yt
It is also shown in Stormlands (Center of the map?), when hidden.
This should be fixed for 2.3, though shall need some testing.