Credit memo generated with a positive amount in project billing

Summary:

How to interface the credit memo generated with positive value in project billing to AR.

Content (required):

A credit memo was generated with a positive value in project billing. When trying to interface the credit memo to AR, we are getting the following error message:

"You cannot apply a transaction with a negative amount to another transaction with a negative balance and vice versa"

This message is coming because the credit memo has positive value and it trying to apply this credit memo to another invoice with positive balance. Does anyone know how to resolve this?

Any solution would be greatly appreciated!