Question about Yubico YubiKey 5 NFC

According to my research and the manufacturer's information, the different firmware versions have the same EAN codes, so unfortunately it is not possible for us to guarantee which firmware version will be delivered, as the versions can mix with the different suppliers and transport routes. As long as the previous firmware versions are in circulation, it is likely that they will be delivered. This is also one of the reasons why there is no specification on the product page.