How to avoid losing the key when flashing the machine?

[tianyi725]

Description of the feature you're suggesting.

I don't have an invitation to the flipper zero forum, so here's a question.

How do you flash the core2?
Is it only core2 that can lose the key in the genuine version when flashing?
The normal "install from file" loading of tgz file flashing has no impact on the key.

I want to know the brushing method of core2 to avoid the loss of key.
thankyou

Anything else?

No response