Red Hat Satellite 6.2 manifest import fails

Issue

Attempting to attach a manifest to Red Hat Satellite 6.2 fails with the following error:

Runtime Error query did not return a unique result: 2 at org.hibernate.internal.AbstractQueryImpl.uniqueElement:914
2016-08-08 15:10:01,135 [thread=http-bio-8443-exec-4] [req=9156e50d-852d-4256-b49e-8493bd9f1978, org=OrgName] ERROR org.candlepin.common.exceptions.mappers.CandlepinExceptionMapper - Runtime Error query did not return a unique result: 2 at org.hibernate.internal.AbstractQueryImpl.uniqueElement:914
org.hibernate.NonUniqueResultException: query did not return a unique result: 2
        at org.hibernate.internal.AbstractQueryImpl.uniqueElement(AbstractQueryImpl.java:914) ~[hibernate-core-4.2.5.Final.jar:4.2.5.Final]
        at org.hibernate.internal.CriteriaImpl.uniqueResult(CriteriaImpl.java:396) ~[hibernate-core-4.2.5.Final.jar:4.2.5.Final]
        at org.candlepin.model.PoolCurator.findUeberPool(PoolCurator.java:334) ~[PoolCurator.class:na]