Installed this version on Mi MiNote 2.
I was still running a very stable beta version from 2017 (MIUI 8.6) , so it became time :)
1. All user App backup with Titanium Backup
2. TWRP backup of Boot, System and Data
3. Factory reset from within current MIUI
4. TWRP wipe Dalvik / ART Cache, Cache...