Hello,
I have encountered annoying problem related to assigning task to boards that I can't solve on my own.
I have a Software project (let's say called "someproject") and 5 boards related to it. So far if I needed to add a new issue to any of them I could easilly to do that (let's call them "something1/2/3/4/5")

I've just added one another board "Something6" using simple JQL (project = someproject ORDER BY Rank). This filter is available for all users "someproject" users:

I can see this new "Something6" board on the list of available boards in the top, left side menu in my project:

BUT I can't assign any newly created issue to it. What should I do to solve that issue?