Why can’t I choose to rollback the firmware from current to a previous version DJI?!

I live in Australia, not in another country where I have to have an ID to be able to fly, this is ridiculous.

Hi there. In some conditions, the previous firmware versions will be removed from the server. The firmware cannot be downgraded to a removed version. However, any firmware that can be obtained from DJI Assistant 2 is available for usage. Thank you for your patience.