Turn off autocomplete event name internal to Apple's Calendar app on Mac OS? This is not about system autocomplete, it's about an autocomplete internal to Calendar (autocompletion of the name of the event when you create one) - and is there any way to turn it off.

I have many hundreds of events in ical as I've been using it for about the past five years.   

Problem is whenever I create a new event, then start typing in the event name field, as I work out what I want to call the event (or reminder), a giant list of similar past events that I've entered pops up and is annoyingly distracting. I'm simply not interested in those past events anymore and I don't want to know about them. I use ical as a reminders system for tasks, i.e. as a todo list as well as calendar. I find that better than using a separate task app in addition.

I'd love to find a way to turn these suggestions off, without having to delete all past events from my calendar history (which it looks like I might have to resort to).

Haven't found a way to do this but would be very grateful if someone knows how.
I've just done a clean install to Catalina and signed in to iCloud. Without any action on my part, I no longer get the autocomplete suggestions when making new events. But I did not intend to disable them. Maybe that's helpful to someone.