Larian Studios Forums Divinity - Original Sin Divinity Original Sin - Mods Help, I can no longer edit terrain: source control

I have made a mod with a good amount of terrain, and suddenly, all terrain objects in my modules can no longer be edited. If I make a new terrain within the same module I can edit it. This all seems very strange considering I haven't been in the two other levels, being a copy of the main menu and character creation screen. I assume I have hit a button that disables editing of these objects somehow. Anybody who know a solution?

Edit: When I try to remove the terrain objects that says this object is locked by source control, so it definitely seems like an intentional feature from Larian's side, though I still have no idea as of how to remove it.