What happens if the Completion Date is changed to a later date after delay damages have been paid?

NEC3 and NEC4 Contracts Secondary X, W and Y options
1

What happens if the Completion Date is changed to a later date after delay damages have been paid?

2

If the Completion Date is changed to a later date after delay damages have been paid, the Employer repays the overpayment of damages (see Clause X7.2).