"The method or operation is not implemented" during reflection

20170622,04:40:15,UNIFY Identity Broker,Adapter,Error,"Adapter
Adapter d68b1c92-f699-4484-b543-328a0607375a page errored on page reflection. Duration: 00:00:01.6547524. Error: System.NotImplementedException: The method or operation is not implemented.
   at Unify.Product.IdentityBroker.EntityIdBIDTemplateDistinguishedNameComponentExecutor.GetKey()
   at System.Linq.Enumerable.<selectmanyiterator>d__16`2.MoveNext()
   at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
   at System.Linq.Enumerable.<selectmanyiterator>d__16`2.MoveNext()
   at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
   at System.Linq.Enumerable.WhereEnumerableIterator`1.MoveNext()
   at System.Linq.Buffer`1..ctor(IEnumerable`1 source)
   at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source)
   at Unify.Product.IdentityBroker.KnownEntityBase`3.GetBaseKeysIter(TKey key)
   at Unify.Product.IdentityBroker.KnownEntityBase`3.GetValueOriginInformation(TKey key)
   at Unify.Product.IdentityBroker.EntityToEntityValueOriginsAdapter`2.<>c__DisplayClass3_0.<transform>b__0(GroupedNameValueCollectionKey schemaKey)
   at System.Linq.Enumerable.<selectmanyiterator>d__16`2.MoveNext()
   at System.Linq.Enumerable.<selectmanyiterator>d__16`2.MoveNext()
   at System.Linq.Buffer`1..ctor(IEnumerable`1 source)
   at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source)
   at Unify.Product.IdentityBroker.Adapter.WriteReflectionPageAdapterChanges(IAdapterEntityPartitionUpdatableContext adapterContext, IDictionaryTwoPassDifferenceReport`4 report, IAdapterEntity[] newAdapterEntities)
   at Unify.Product.IdentityBroker.Adapter.ReflectChangesInner()
   at Unify.Product.IdentityBroker.Adapter.ReflectChanges()
   at Unify.Product.IdentityBroker.AdapterAuditingDecorator.ReflectChanges()
   at Unify.Product.IdentityBroker.AdapterNotifierDecorator.ReflectChanges()
   at Unify.Product.IdentityBroker.ReflectAdapterOnChangeDueJob.<runbase>b__9_0(IOperationalAdapter adapter).