Can I make my existing static QR code dynamic?

Yes, You can make static QR code dynamic by editing the QR code and checking the 'Make dynamic' box below the input field, and clicking on the "save QR code" button. That will make your static QR code a dynamic one.

But please keep in mind that you will have to re-print the new code once, as the dynamic QR code is different than static QR code.

But moving forward you will have flexibility of the dynamic code, where you may change its url at any time without need to re-print ever.