I searched all the places where NUMBER_GET_NEXT is used with range object KONV and everywhere the range number is hardcoded to V='01' or M='02'.
So it seems it is not configurable.
I do not know if it is considered a "good practice", but can the range 01 in range object KONV be changed from 1/999999999 to 2000000000/2999999999?
If not, I would look into archiving data to free numbers in the beginning of the range.