Fix cleaning of the zone

address_utils/address_utils.go

@@ -240,10 +240,16 @@ func CleanZone(countryToClean, zoneToClean *string) (newCountry, newZone *string
 		zone := string_utils.RemoveAllWhiteSpaces(*zoneToClean)
 
 		for provinceCode, province := range Provinces {
+			found := false
 			for _, name := range province.Names {
 				if strings.ToLower(zone) == strings.ToLower(string_utils.RemoveAllWhiteSpaces(name)) {
-					zone = string_utils.ReplaceCaseInsensitive(zone, name, provinceCode)
+					zone = provinceCode
+					found = true
+					break
+				}
 			}
+			if found {
+				break
 			}
 		}