Changing the name of the slug of a unit in CoursePress Pro ?

Hi again, one other quick CoursePress Pro question...

I have some weird things appearing as the permaling titles of my units... For example, my unit titled "Contexte économique" uses "untitled-2" as a permalink name, as you can see on the url :

Same for others. I don't know how and where I can modify that... but it should obviously be possible. Especially since you allow to duplicate a course (if you duplicate a course to create another one, it's obvious that the name of the units in the new course should change, and thus the permalink as well, right ?)

Please let me know, surely I'm missing something... :wink: Thanks !