If you update the custom field name for a product in the product details section in Swipe, the previous custom field will be deleted, and the data will be lost. The updated custom field name will only appear when you edit previous invoices or create new ones.
Note: If the custom field does not appear on your invoice, Please check if you have entered any value in that custom field.
The custom field will only appear on your invoice if a value has been entered for at least one product in that field.