Multiple FHIR versions per Cerner FHIR data server

[Serhii Maksymchuk]

Hello,

Could you please help understand if single Cerner FHIR data server can support more than one FHIR version in production environment?

As I understood, open sandbox FHIR data server corresponds to single specific FHIR version, because URL indicates that.
FHIR data server URL (open sandbox): https://fhir-open.cerner.com/r4/{TENANT_KEY}
Based on the document: https://fhir.cerner.com/millennium/r4/#open-sandbox

Will Cerner FHIR data server URL correspond to single specific FHIR version in production environment as well?
Should accept header with specific FHIR version be sent to request FHIR resources (e.g. patient, encounter, etc.)?
Accept: application/fhir+json; fhirVersion=4.0

Thanks in advance,
Serhii Maksymchuk

[Serhii Maksymchuk]

Just one addition. Above questions related Cerner Millennium FHIR data server in particular.