How to override an Officer Code using Contractor Access Import in Confirm

Product Feature: Ad-hoc Reporting

Is it possible to import a new officer code over an existing officer code when using a contractor import csv file? We are testing our imports for Works Manager, but do not seem to be able to change the officer code to assign the work out. Est start and comp dates work fine, as do status updates.

It is not possible to overrride the officer code using the contractor import.  Users are able to create new officer codes but not copy over exisiting ones.
UPDATED:  August 16, 2017