put your phone in fastboot mode by holding the vol down button and rebooting your phone
download the minimal adb and fastboot https://androidfilehost.com/?fid=962187416754459552
extract it and double click cmd-here.exe
type fastboot getvar anti
features of Redmi 6 Pro toolkit:
unlock Bootloader using unlock tools [inbuild]
Root on MIUI without bootloop
Flash Official ROM or MIUI update[fastboot ROM] over fastboot Without Relocking the bootloader
unbrick via Fastboot
Bypass MI account [ up to 3 Method included]...
fastboot getvar anti
If 3 you are safe and can roll back to previous versions of firmware If 4 that rollback of firmware can lead to "brick"
i suggest you read the 4pda thread http://4pda.ru/forum/index.php?showtopic=910594
phone came with the fake 18.104.22.168(ODMMIFD) version flashed the above twrp and updated to xiaomi.eu_multi_HM6Pro_8.8.30_v10-8.1.zip
found the above version while reading other forums while looking to see if there would be any issues upgrading, there was not