[Python] Why is data lost from slots? Rasa Open Source

I am writing here, because i have a problem with slots in rasa open source version 3.6.9. After moving in my history, I see that the data of some slots is lost or set to None. I wonder if someone have had this inconvenient. If you have had this problem, please tell me how I could fix this.

Here I leave you my history:

- story: buy ticket path 1
steps:
- intent: buy_ticket
- action: utter_ask_event
- intent: provide_event
- action: action_utter_provide_event
- slot_was_set:
- event_found: True
- intent: affirm
- action: utter_ask_quantity
- intent: provide_quantity
- action: utter_ask_email
- intent: provide_email
- action: user_email_form
- active_loop: user_email_form
- slot_was_set:
- requested_slot: user_email
- active_loop: null
- action: action_utter_provide_price


And slots:

slots:
event:
type: text
mappings:
- type: from_entity
entity: event
quantity:
type: float
mappings:
- type: from_entity
entity: quantity
event_found:
type: bool
mappings:
- type: from_entity
entity: event_found
season_zone_id:
type: float
mappings:
- type: from_entity
entity: season_zone_id
user_email:
type: text
mappings:
- type: from_entity
entity: user_email
forms:
user_email_form:
required_slots:
- user_email


When I get to action user_email_form, I do have None in event, event_found and season_zone_id, these three slots were set in action_utter_provide_event.

I appreciate any help you can provide.

View here: https://forum.rasa.com/t/why-is-data-lost-from-slots/66651

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