Maven Enforcer Plugin does not fail build with use of banDuplicatePomDependencyVersions rule when there are duplicates between top level parent pom and children poms

[Dan S]

Has anyone ever used Maven Enforcer Plugin with
rule banDuplicatePomDependencyVersions? I identified duplicate dependencies
and wrote ticket NIFI-10565
<https://issues.apache.org/jira/browse/NIFI-10565>. I added the
banDuplicatePomDependencyVersions to the  list of Enforcer rules on a
branch that still has the duplicates yet when building, the build does not
fail. I am not sure why there is no failure.