Can I edit Pay Group in Invoice Header once Invoice is Validated?

Pay Group in Invoice Header cannot be updated upon invoice validation. Invoice Lines includes Withholding tax details and distributions. Once I validate it, I cannot already update the Pay Group assigned. If I don't populate withholding tax details, the Pay Group can be updated.

What I want is to be able to edit the Pay Group field even after the invoice has been validated.

Is there any workaround available for this?

Thanks.