I have a situation where a customer projects has two sale orders attached to the same project.
The reason being is that the customer issues two separate purchase orders for the services and expense. This would allow the two separate invoices to be issued
The issue I'm having is during the invoice request process using the automatic method I'm able to create and release the invoice for the services. However when I try and create an invoice request for the expenses using the automatic method by changing the Sale Order Reference ( So I reference the sale order for the expenses) I receive an error "cannot update order reference, sale order already assigned.
Note if I create an "manual invoice request" I get no error I'm able to create two invoice for each sale order.