It means the map is from another copy of ATR.
I have only one copy of ATRace. I tried deleting the map from the AP and reloading it. No luck. My guess is that it's an ATRace issue. I loaded an upgrade for that as well.I had the grey out issue but no message. Some part of the file was corrupted. Cobb told me to clear the map on the ap and re upload it. Maybe give that a try while you're waiting for a response.