On one particular board, I have many similar tasks that I use the same checklist for. It appears that at some point I saved that checklist somewhere as a template. When I start a new card and click to add a checklist, it gives me the suggestion of using that checklist, pictured in this screenshot.

Any idea how can I get to that template to edit it? Or is it not actually a template at all?
Advice is appreciate. Thank you!