In story.yml, slot_was_set can't put between two action?

Rasa Open Source
1

why I see the rasa3 course,it seem it OK? N20V6(0Y721$IV0N`(5ZOMA you can see the slot_was_set ZARAU9{(I~4R@0%A$K@3CGR

2

use what package?rasa_x or else?