How to resolve HDL Error while updating worker dat file for hire date change

Summary:

How to resolve HDL Error while updating worker dat file for hire date change

Content (please ensure you mask any confidential information):

We have a requirement to update the Hire date of some employees to a prior date. We have created the attached dat file to update the hire date. System is erroring out few records with the below error .

1) "You can't change the selected work relationship's start date to before {0}, which is the start date of another existing work relationship.". We have deleted the pending work record for all such employees but still facing same issue.

2)You can't change the legal employer hire or start date if multiple assignment records exist for the same date. You must remove the records to change the date.