Duplicated terrain adjustments affecting original

I just duplicated a scene and duplicated also a terrain in it so i could test some adjustments in it. But I have found that somehow by adjusting the duplicate terrain it has also affected the original( Perhaps they share the same Splat map….not sure).
I wasn’t so worried because I have recently added a TimeMachine to my setup.
However when I tried to restore to a session 1 hour earlier, I found that the terrain still stays as the newly adjusted terrain and does not restore to the original case….which seems kind of wrong….
Any ideas on how I can revert to the original terrain?

Yes – Terrains don’t work like prefabs. There is one master copy of the splatmap, heightmap, everything. When you drag in a Terrain, you really have a link to the shared Terrain in Assets (like how Materials work.) I assume it’s to save (massive amounts) of space. If you really need a similar version, can make a copy, from the editor.

TimeMachine means backup, right? (they thought no one knows what backup means?) If you did it correctly before making the changes, I guess keep trying to restore. Otherwise, live and learn. You’ll make the ground way better on the 2nd try anyway.