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:144)

	at org.hl7.fhir.r5.comparison.ProfileComparer.compare(ProfileComparer.java:99)

	at org.hl7.fhir.r5.comparison.ComparisonSession.compare(ComparisonSession.java:92)

	at org.hl7.fhir.r5.comparison.ProfileComparer.intersectTypes(ProfileComparer.java:619)

	at org.hl7.fhir.r5.comparison.ProfileComparer.compareElements(ProfileComparer.java:208)

	at org.hl7.fhir.r5.comparison.ProfileComparer.compareChildren(ProfileComparer.java:307)

	at org.hl7.fhir.r5.comparison.ProfileComparer.compareElements(ProfileComparer.java:224)

	at org.hl7.fhir.r5.comparison.ProfileComparer.compare(ProfileComparer.java:131)

	at org.hl7.fhir.r5.comparison.ComparisonSession.compare(ComparisonSession.java:92)

	at org.hl7.fhir.igtools.publisher.PreviousVersionComparator.finishChecks(PreviousVersionComparator.java:251)

	at org.hl7.fhir.igtools.publisher.Publisher.checkConformanceResources(Publisher.java:4081)

	at org.hl7.fhir.igtools.publisher.Publisher.loadConformance(Publisher.java:3987)

	at org.hl7.fhir.igtools.publisher.Publisher.createIg(Publisher.java:901)

	at org.hl7.fhir.igtools.publisher.Publisher.execute(Publisher.java:753)

	at org.hl7.fhir.igtools.publisher.Publisher.main(Publisher.java:8766)