How to proceed with the parametr "limit_choice_to"?

[Seti Volkylany]

On the one hand it is restriction choice in admin, but on the onther hand if limit_choice_to is {'is_active': True} on model Article, then user posted its article in past and all right.

In case if user now is not active, he does not cease to be author of the article but in admin now is not displayed and not possible choiced his.

What do you advice?