Device > Safety > Coding > system url/oid not validating

[SavannahDearing]

json excerpt: "safety" : [ { "coding" : [ { "code" : "C113844", "display" : "Labeling does not contain MRI Safety Information", "system" : "https://ncithesaurus-stage.nci.nih.gov/ncitbrowser/" } ],

error message: Bundle.entry[0].resource.safety[0].coding[0]: Code System URI 'https://ncithesaurus-stage.nci.nih.gov/ncitbrowser/' is unknown so the code cannot be validated

Validator Settings: IG: hl7.fhir.r4.core Profile: http://hl7.org/fhir/StructureDefinition/Device

Spec links: https://www.hl7.org/fhir/valueset-device-safety.html https://terminology.hl7.org/3.1.0/ValueSet-v2-0963.html

system values tried: urn:oid:2.16.840.1.113883.4.642.3.213 http://ncithesaurus-stage.nci.nih.gov https://ncithesaurus-stage.nci.nih.gov/ncitbrowser/

I'd imagine the second one is the 'most correct' but all 3 result in the same error from the validator.