For what its worth I found I was getting too many saved clipboards and wanted to clean up several of them that I made or were imported from others that could share things like my “Temporary Clipboard 1” or “Temp Clipboard 2.”
I just went into my clipboard and one by one changed each one to a name I knew I would not have in any macros, something like “Billy Bob.” Then, thanks to the greatness of Peter, all the macros that referenced that clipboard change to the new name of the clipboard. In the Keyboard Maestro Editor with the “All Macros” smart group selected, I had a search for “Billy Bob” and every macro that used that clipboard. I went through and changed the referenced clipboard for macros that populated that clipboard within the run macro to one of my temp clipboard and cleaned out several unnecessary clipboard clutter that had built up over time.
Probably obvious to many but thought I’d post anyway for people like me that miss the seemingly obvious.