The quick cataloguing form has a variant depending on whether you access it through Fulfillment > Manage Patron services > loan tab > create item or through Resources > add a physical item.

In the first case (Fulfillment > Manage Patron services etc.), quick cataloguing is used in the case where a document is presented for loan but does not exist in the database. The barcode is then obligatory for loan, otherwise loan is not possible. The barcode cannot be automatically created.

In the Resources > add a physical item access to this form, the barcode is not mandatory but when automatic barcode generation is enabled, this will create a barcode.

We would suggest that the ability to have automatic barcode generation should be available in quick cataloguing form in all cases. While creating an item quickly before a loan, it may happen that an item doesn't previously have a barcode.