When a negotiating body is uplifted, payscales are created with a new effective date and pushed out to all employees. This will create a new salary line for them with the effective date of the new values.
Transferring an employee to a different post will also create a new salary line. Because of this, if the transfer and uplift happen on the same day two salary lines will be created with the same date, which the system will not allow.
To resolve this:
Before transferring the employee, search for them and go to their profile.
Click Payroll, then Pay.
Click Pay History.
Select the salary line with the effective date of the uplift.
Click Delete.
You may see an error but if you refresh the browser page you will see the salary line has been removed.
Go to Employment, then Position.
Click Transfer Employee/Change Post to proceed with the transfer.