To be static or to be dynamic; that is the QR code question
Static QR codes encode the information when they are created. Once their content is selected, it cannot be changed or updated.
Dynamic QR codes encode a unique short URL which works as a link to the selected content. Their content can be changed or updated without having to reprint the QR codes, and they can be trackable.
If you want to know how to create a dynamic or static QR code, check the following articles: