Weird deletion? Can't find show

We had one show that showed up twice in our schedule (on purpose). We wanted to eliminate one of the instances. So I clicked on the extra instance and was presented with a menu for which the last item was “Delete” (not “Retire”). When I clicked it, both instances of the show in the schedule disappeared. How do I restore the second instance? Why is the option Delete and not Retire? I see that on other shows that show up in the schedule more than once it says Delete, but shows that have a single slot have Retire.

There are playlists for this show, and there are some duplicate shows that have almost the same name, but were deactivated years ago.

Best,

Jonathan