This field contains the barcode number. The number must be unique - you cannot have the same number
twice in one table. You can create as many numbers as you like.
There are two ways to fill in this field:
You can insert the barcode number manually for a specific item. You cannot use a number that is used as an No. or
No. field in the Income/Expense Account table.
If you are using variants you can have the system create barcodes automatically for each variant.