org.hl7.fhir.exceptions.DefinitionException: StructureDefinition is not for an profile - can't be compared (left: Identifier)
	at org.hl7.fhir.r5.comparison.StructureDefinitionComparer.check(StructureDefinitionComparer.java:191)
	at org.hl7.fhir.r5.comparison.StructureDefinitionComparer.compare(StructureDefinitionComparer.java:127)
	at org.hl7.fhir.r5.comparison.ComparisonSession.compare(ComparisonSession.java:105)
	at org.hl7.fhir.r5.comparison.StructureDefinitionComparer.intersectTypes(StructureDefinitionComparer.java:985)
	at org.hl7.fhir.r5.comparison.StructureDefinitionComparer.compareElements(StructureDefinitionComparer.java:275)
	at org.hl7.fhir.r5.comparison.StructureDefinitionComparer.compareChildren(StructureDefinitionComparer.java:378)
	at org.hl7.fhir.r5.comparison.StructureDefinitionComparer.compareElements(StructureDefinitionComparer.java:291)
	at org.hl7.fhir.r5.comparison.StructureDefinitionComparer.compare(StructureDefinitionComparer.java:171)
	at org.hl7.fhir.r5.comparison.ComparisonSession.compare(ComparisonSession.java:105)
	at org.hl7.fhir.igtools.publisher.comparators.PreviousVersionComparator.finishChecks(PreviousVersionComparator.java:261)
	at org.hl7.fhir.igtools.publisher.Publisher.checkConformanceResources(Publisher.java:6097)
	at org.hl7.fhir.igtools.publisher.Publisher.loadConformance(Publisher.java:5913)
	at org.hl7.fhir.igtools.publisher.Publisher.createIg(Publisher.java:1233)
	at org.hl7.fhir.igtools.publisher.Publisher.execute(Publisher.java:1072)
	at org.hl7.fhir.igtools.publisher.Publisher.main(Publisher.java:14137)