Please add the possibility to create multiple designs for a single QR code
i.e. editing a QR code design doesn't automatically overwrite the current design, but asks the user if he wants to create a new instance of the same code. Therefore, all the designs of a QR code will share the same vanity URL.
You could also choose to create more (child) codes with the same vanity URL, which results in adding new designs for the same (parent) QR code.