ZukZ2pro_ update 7.1 to 8.1

I want to update from 7.1 to 8.1 _ what do I have to consider?
I use MK71.2-z2pro-201807112106-NIGHTLY.zip.
Can I install the MK81.0-z2pro-201807111852-NIGHTLY.zip without problems?

wipe /data and /system

so i have installed
It is error message: failed mount / vendor :frowning: