Dynamic filters disappearance

Sep 27 at 4:02 PM
Edited Sep 27 at 4:09 PM
Hi,

I added "Oher columns" in my vertices worksheet : dates of Birth, Election and Death.
Automatically, they appeared in my dynamic filters at first... but I don't know why one of them disappeared ("election", which is the most important for me) from the dynamic filters window.
It's still in my worksheet, but there is no range bar for it when I open the Dynamic filters window. I can't find the way to make it appears again.

Thanks a lot !