org.hl7.fhir.exceptions.DefinitionException: StructureDefinition is not for an profile - can't be compared (left: Identifier)
	at org.hl7.fhir.r5.comparison.ProfileComparer.check(ProfileComparer.java:170)
	at org.hl7.fhir.r5.comparison.ProfileComparer.compare(ProfileComparer.java:125)
	at org.hl7.fhir.r5.comparison.ComparisonSession.compare(ComparisonSession.java:96)
	at org.hl7.fhir.r5.comparison.ProfileComparer.intersectTypes(ProfileComparer.java:676)
	at org.hl7.fhir.r5.comparison.ProfileComparer.compareElements(ProfileComparer.java:239)
	at org.hl7.fhir.r5.comparison.ProfileComparer.compareChildren(ProfileComparer.java:339)
	at org.hl7.fhir.r5.comparison.ProfileComparer.compareElements(ProfileComparer.java:255)
	at org.hl7.fhir.r5.comparison.ProfileComparer.compare(ProfileComparer.java:157)
	at org.hl7.fhir.r5.comparison.ComparisonSession.compare(ComparisonSession.java:96)
	at org.hl7.fhir.r5.comparison.ProfileComparer.checkAddTypeUnion(ProfileComparer.java:609)
	at org.hl7.fhir.r5.comparison.ProfileComparer.unionTypes(ProfileComparer.java:546)
	at org.hl7.fhir.r5.comparison.ProfileComparer.compareElements(ProfileComparer.java:238)
	at org.hl7.fhir.r5.comparison.ProfileComparer.compareChildren(ProfileComparer.java:339)
	at org.hl7.fhir.r5.comparison.ProfileComparer.compareElements(ProfileComparer.java:255)
	at org.hl7.fhir.r5.comparison.ProfileComparer.compare(ProfileComparer.java:157)
	at org.hl7.fhir.r5.comparison.ComparisonSession.compare(ComparisonSession.java:96)
	at org.hl7.fhir.igtools.publisher.comparators.PreviousVersionComparator.finishChecks(PreviousVersionComparator.java:256)
	at org.hl7.fhir.igtools.publisher.Publisher.checkConformanceResources(Publisher.java:5647)
	at org.hl7.fhir.igtools.publisher.Publisher.loadConformance(Publisher.java:5484)
	at org.hl7.fhir.igtools.publisher.Publisher.createIg(Publisher.java:1080)
	at org.hl7.fhir.igtools.publisher.Publisher.execute(Publisher.java:927)
	at org.hl7.fhir.igtools.publisher.Publisher.main(Publisher.java:11693)