If I want to flash stable, do I only have to wipe dalvik+cache+data? Or also system, storage or sd card?
And does stable need a manual installation of GApps?
If I want to flash stable, do I only have to wipe dalvik+cache+data? Or also system, storage or sd card?
And does stable need a manual installation of GApps?
Yes I experienced the same. But how do I flash that build now since it's a build from earlier on? Can I just boot in TWRP, install ROM + SuperSu and wipe cache/dalvik? Or do I have to wipe data as well?
Nope, this error you can ignore. It has been in the last 5 roms as I know and this was questioned many times before. Nothing to worry about, everything's fine :)
This is a voluntary topic. I think a lot of people did read your question (just like me) but they are unable to help you because they might have a different Xiaomi model or don't have the problem.