It appears the system might be using patron barcode as the primary ID for patron records rather than patron record number. This is problematic when a patron loses their barcode and it needs to be replaced or, as mentioned in another idea, the patron has multiple barcodes for some reason. This makes it difficult for a patron to keep track of their past programs, as well as their waitlists, which no longer function if their barcode changes. Would also probably require a way to merge records that exist with the same patron record number.