Autoinvoice payment terms blank in screens

Summary:

We have loaded invoices using autoinvoice. The load was marked as completed as successful but when querying in the screen the payment term is blank and the correct payment term isn't selectable. The payment term exists as a common term and is selectable on a new invoice that is created manually. The invoice has the correct instalment plan and if queried in the tables has the payment term against it. If I try and save the invoice it errors saying that it has no payment term. The customer profile has a default term but the override terms option is ticked