R3/R4 conversion

I am trying to convert a JSON file in STU 3 form to R4 form .I have tried using FHIR Validator following this page https://wiki.hl7.org/Using_the_FHIR_Validator_to_transform_content
but when I run the command it gives the following error:

  • … load IG from hl7.fhir.transforms.v4v3
    Exception in thread “main” org.hl7.fhir.exceptions.FHIRException: Unable to resolve the package ‘hl7.fhir.transforms.v4v3’
    at org.hl7.fhir.utilities.cache.PackageCacheManager.loadPackage(PackageCacheManager.java:674)
    at org.hl7.fhir.r5.validation.ValidationEngine.resolvePackage(ValidationEngine.java:631)
    at org.hl7.fhir.r5.validation.ValidationEngine.fetchByPackage(ValidationEngine.java:620)

I transformed a JSON file from STU 3 for to R4
using the FHIR validator jar

Using the following code to transform :

org.hl7.fhir.r4.model.Patient inR4= converter. convertPatient (p1);
this program is converting the version but the urls like the system in identifier as shown below

“identifier”: [
“use”: “usual”,
“type”: {
“coding”: [
“system”: “http://hl7.org/fhir/v2/0203”,
“code”: “MR”

are the same so the response is failing the validation for version 4.0.1 of the FHIR validator
I cant seem to find any code regarding the transformation of urls
do we need to change the urls? and how we do it?