This project had a source model, abstraction layer (transformed from source), and a view model with a transformation. The transformation is essentially:

SELECT * FROM vParts.Supplier AS s, vParts.Supplier_parts AS sp WHERE s.Supplier_id = sp.Supplier_id

I added a second source and then used Refactor > Rename to change the original abstraction layer model from vParts to vParts_Oracle.

The transformation was altered like this:

SELECT * FROM vParts_Oracle.Supplier AS s, vParts.Supplier_parts AS sp WHERE s.Supplier_id = sp.Supplier_id

So, it changed only the first instance of the model, leaving the transformation invalid.

I'll attach a Model Project Set.