Using a team-managed project, setup as Kanban, we have the Board and Backlog:

But we have to manually drag tickets to/from the Board/Backlog!
We have two statues that should reflect which board they show on.
- Draft Backlog -> Backlog
- Ready Backlog -> Board

How can I automatically move tickets from one to the other?
I tried setting up Automation, but cannot find the correct action to perform.
Eg here I tried setting it to "Next Sprint":

But get this error: "You have selected a Next Gen kanban board. Select a board that uses sprints to continue."