Niévre Asteroid Field happens to exists on both the Burgundy and the Champagne maps, on the very same spot on both system maps, however it cannot be found in Champagne in-game.
Weird, it appears to be defined in ew16.ini (the system .ini for Champagne) in a way that'd make me expect that it should show up in-game as shown on the map, but this does indeed not appear to be the case, so I'm not sure what's going on here. I'll go take a look; thanks for the heads-up!
EDIT [16:16 01.11.2016 UTC+0]: Added a temporary fix for this now.