Removing an item from an invoice displays a paid invoice message.

When an invoice has an item that was transferred to a different invoice, and you try to remove the transferred item, the system displays an alert message. 

Instructions   

1. When the system displays "The invoice (the invoice number is inserted) cannot be altered because it has already been Paid," open the invoice number that is displayed in the alert message.
2. Change the status from Paid to Active.
3. Return to the original invoice and remove the item.
4. Change the invoice status as needed for additional edits or refunds.