At the moment, Breww generates NR container labels with barcodes at the point of racking. You can also generate these labels from a planned packaging (so in advance of racking), but at this point, they don’t show a barcode. This is explained further at How to print stock (racking/packaging) labels.
This feature request is to allow printing these labels with their NR barcode in advance of racking. This would involve Breww having to generate and “reserve” the NR codes from the point of printing the labels and then use these reserved codes when the racking is created.
If you’d like to see this, please give this thread a vote 