This might well be due to my bad use of the system or incomplete knowledge of accounting!
I have the Purchase Order Number order set to automatic. When the order is complete I do a “Copy to Purchase Invoice” and I then delete the order as it’s not needed anymore as all the information is in the invoice. However, when I then create a new Purchase Order it uses the same number as the one I have deleted and when that order is complete I then “Copy to Purchase Invoice” and so I now two invoices with the same order number.
Should I not delete the Purchase order when it is completed? Or is there a way of automatically generating the next number in sequence even if I have deleted the order?