Upgraded transformations not editable

Request to update a selected transformation in a selected adapter.
Request to update the bbb7ffdf-d50d-4e2d-a78f-e56eb009eef3 transformation in the ba1a8cf9-e7af-42dd-b53f-34c0ca938221 adapter errored with message: Transformation of type Relation.Group.dn is not known by the adapter engine. Verify it has been added correctly to the list of known transformation generators.. Duration: 00:00:00.0156002
Error details:
System.ArgumentException: Transformation of type Relation.Group.dn is not known by the adapter engine. Verify it has been added correctly to the list of known transformation generators.
 at Unify.Product.IdentityBroker.AdapterEngine.<>c__DisplayClass7c.<UpdateTransformation>b__7b()
 at Unify.Product.IdentityBroker.AdapterEngine.<>c__DisplayClassd9.<ConfigurationChange>b__d8()
 at Unify.Framework.ExtensionMethods.WaitOnMutex(Mutex mutex, Action work)
 at Unify.Product.IdentityBroker.AdapterEngine.UpdateTransformation(Guid adapterId, IAdapterEntityTransformationConfiguration transformationConfiguration)
 at Unify.Product.IdentityBroker.AdapterEngineNotifierDecorator.UpdateTransformation(Guid adapterId, IAdapterEntityTransformationConfiguration transformationConfiguration)
 at Unify.Product.IdentityBroker.AdapterEngineAccessor.UpdateTransformation(Guid adapterId, IAdapterEntityTransformationConfiguration transformationConfiguration)
 at Unify.Product.IdentityBroker.IdentityServiceCollector.UpdateTransformation(Guid adapterId, AdapterEntityTransformationConfiguration configuration)
 at SyncInvokeUpdateTransformation(Object , Object[] , Object[] )
 at System.ServiceModel.Dispatcher.SyncMethodInvoker.Invoke(Object instance, Object[] inputs, Object[]& outputs)
 at System.ServiceModel.Dispatcher.DispatchOperationRuntime.InvokeBegin(MessageRpc& rpc)
 at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage5(MessageRpc& rpc)
 at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage31(MessageRpc& rpc)
 at System.ServiceModel.Dispatcher.MessageRpc.Process(Boolean isOperationContextSet)