Hi everyone,
as per the title, i'm having some troubles to create a rule to assign a ticket to his previous owner. Workflow looks like this:
TO DO --> IN PROGRESS --> VALIDATION -->[Ticket is assigned to me using a rule]
now, depending on the validation outcome, the ticket might be moved to "DONE' or back to "IN PROGRESS' if validation fails. In this specific case i need a rule to reassign the ticket to the previous owner. Searching in some posts here on the community i've seen that in the past there was a specific selection for the rule (Transition-->Assign ticket-->Previous owner), but looks like that this action is not available anymore, or at least is not available on my board:

What am I missing?