There’s command-line options you can use to change the productcode or family code

  --fc, --familycode=code
                         Garmin map family code (integer, default value is 1)
  --fn, --familyname=name
                         Garmin map family name
  --pc, --productcode=code
                         Garmin map product code (integer)
  --pn, --productname=name
                         Garmin map product name