d43df8b8_ehire__or_Interagency_Transfer__then_
[If…] you are correcting the employment date (ASSIGN DT) and/or position number (POSITION) for HØCUS Switch 1 [then…] 
a new HNP row is generated, and the existing position record is deleted unless actual expenditures are posted to the existing position. If actual expenditures were posted to the existing position, USPS generates a message and the employee is assigned to the new position number, but the existing position record is not deleted.
USPS Process Guide: Ch 4, HMPFX - Changing Information for a New Hire, Rehire, or Interagency Transfer
then…