Teiid Connection importer will return all PK/UC definitions exposed by the DB. Some DB's auto-create a unique constraint for an defined PK, which is really redundant.

Teiid Designer has a validation check that looks for PK/UC who share common column ID's and generates an error. This prevents a lot of DDL to end up being imported with errors.

Suggest looking for this use-case in the Teiid DDL Importer logic and removing the redundant UC prior to generating the XMI model