I delete the whole project and re-install it again. It worked. At least for now, just remember NOT to "update to recommend setting"

Now I only have

standard architecture armv7 Latest IOS Active No arm64 armv7 armv7s

(The new setting always have both armv7 and armv7s.)

I think it must the way pythonista setup in an older setting. Hope the next round it would be updated.