How to change Primary Assignment flag to an first assignment

Summary:

Swap Primary Assignment Flag to the First assignment of Employee

Content (required):

Hello Good Day!,

We would like to ask if it is possible to swap the Primary Assignment flag of the employee from its second assignment to the first assignment? I know that there is a current functionality in change assignment where it can be changed but I have trouble changing it into the first effective assignment record of the 1st assignment.

Thank you,

-Vince

Version (include the version you are using, if applicable):

23B

Code Snippet (add any code snippets that support your topic, if applicable):