How can I stop Calendar auto-complete from suggesting my ex? After a divorce, I'd so much like MacOS (10.13)'s Calendar (10, 2195.4.3) to stop suggesting "Dinner with ----" every time I start typing "Dinner" and reminding me each time I want to do something that I did it with someone else for decades.

I haven't found a way to tell Calendar to stop, and I also haven't figured out how to remove all previous invites with their name. All approaches welcome short of dating someone with the same name.
Create a new calendar, delete the old one?