how to update project number under manage distributions for already paid payment requests invoices?

Create accounting is erred out because of incorrect LE at item expense line which is getting derived using SLA based on project number.

To resolve this, we need to change project number under manage distributions for already paid Invoice which is of payment request type. However,we are unable to edit project number (greyed out) and its throwing below error-

'This invoice action is not applicable for the invoice distribution in its current state'.

What is the solution to account this invoice?