Icloud calendar on Mac - Cannot delete or edit a recurring event
I would like to delete a recurring event on my Icloud calendar on the Mac.
clicking on it (in hopes of editing it or deleting it by clicking "delete") => endless spinning wheel (not beach ball) and "loading event details".
Trying to drag it to another day => "couldn't save changes to [title of event]. Your changes to this event couldn't be saved because it was just updated by another device." I do not know of any other device that could be updating it, unless some very specific and peculiar hacker has attacked this one event of my dull calendar.
iMac Pro