On another type the default value for en-route is RNP-2 but this will change to the remote value of RNP 10 when you're a certain distance from the closest land based nav aid in the current Nav data base. As RNP is implemented with different values in differant places some may require RNP 4 and others RNP 10.
I think south china sea/ pacific is RNP 10 and west atlantic may be RNP 4 so the manufacturers are having to change/ update their own equipment as these regulations come into force. Yet another example of ICAO not really doing what they are mandated to do.