Since it is an update you can flash without formatting data. I never did it and had never problems. Merry Christmas [emoji319]
Sent from my MI 12 using Tapatalk
Since seven years I use exclusively the Weekly without serious problems. If that in future should not be possible for some reason, for me it would mean the end of the very appreciated Xiaomi.eu-ROM.
Sent from my MI 12 using Tapatalk
On every UPGRADE (stable to weekly, older weekly to newer weekly, older stable to newer stable) Format is NOT NECESSARY.
Senza from my cupid using Tapatalk