Thanks @ScottHope - That worked and my issue is resolved.
My issue was similar - though not identical - to the one shown in that link....but I was able to feel my way through and apply the same logic and now I have my irons back.
The details: I am a person who does not use the standard set of equipped clubs - specifically, many years ago, I stopped using a Hybrid in favor of carrying a third wedge.
After this morning's rental, the Hybrid was back in my set of clubs - with an equipped club that I have not used in years. I had to try some stuff but ultimately, I was able to get the Hybrid replaced with the 3rd wedge AND I was able to access and equip my irons once again.
I'm curious what was different about this morning's rental. Through the years, I have rented clubs many times, and today is the first time this happened.
In any event, I am up and running again. Thanks for the help - AC