Weird Prompt in World Editor

I keep getting this error in the World Editor, I have no idea what causes it but in a 30 minute session I got 3-4 times. I tried to trace back my actions to see what caused it but nothing fruitful came out

Not sure if this belongs here or in bugs since the message can be safely ignored

This is normal, just keep making your map.

I’ve been assured it is, but I am curious regarding what causes it

There are a lot of reasons it may pop up. The reason I see it most often is because I have viewed a region, and then checked that region out of of the Asset Manager.

Hmm… thanks