I’ve rollbacked to my 8.1 emunand on 9.0 sysnand.
This works.
I’m also struggling to get back the savedata from my 9.0 emunand which is not bootable.
I guess the 9.0 emunand can’t be reverse-engineered(i.e. created/dumped)
auto
Reading another post.
Gotta try it out