Rails - Feb 2006 - Update two models that have belongs_to relationship

I have model Program and model PointOfContact. Program  belongs to 
PointOfContact. There is a form to update values, which shows attributes 
from both models on one form. What is the best way to update the models 
with one call. I tried this and it did not work

Controller code:

    @program_old = Program.find(params[:id])
    @program = Program.new(params[:program])
    @program.id = @program_old.id
    @point_of_contact = PointOfContact.new(params[:point_of_contact])
    @point_of_contact_old = 
PointOfContact.find(@program_old.point_of_contact_id)
    @point_of_contact.id = @point_of_contact_old.id

    current_user = session[:user].login
    @program.updated_by = current_user
    @point_of_contact.updated_by = current_user
    @program.pointOfContact = @point_of_contact


    @program.save!

This does not work and gives the error:
Violation of PRIMARY KEY constraint
''PK__point_of_contact__1F2E9E6D''.
Cannot insert duplicate key in object ''point_of_contacts''
......

Doing update_attributes on individual model works but that is two calls?

Is there a better way to do it?

--Jeet

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