Invoice Not eligible for Deletion Error on Contract Billing void

What is the way to get the void to work when you have retainage on a Contract Billing invoice. Receive Invoice Not eligible for Deletion Error.

Steps to duplicate:

Created Contract billing Invoice with Retainage.

Apply Cash Payment .

Delete Cash Payment

Attempt to Void Invoice in contract History Screen

Receive Invoice Not Eligible for Deletion error.

The cash payment on the Invoice has been deleted but I think the problem is that it the retainage instead of  showing Pay Status of A for approved for payment shows P Paid in full. How do you get past this or how do you unapply the payment so it doesn't show this way?