I need to fetch all the fields of one doctype from another field. [HR-Appraisal Template]

I’ve modified the Appraisal Template Doctype and added some extra fields. Now when in the Appraisal I fetch the saved appraisal template, it didn’t fetches the other fields from Appraisal Template. I need all the Appraisal Template fields to be fetched when I select template in Appraisal Doctype. Please help me tackle this.

Thanks in Advance.