Wont let me delete a meeting

I have a meeting that keeps popping up, it is from a GMAIL calendar I am linked to. I have deleted it off of the gmail calendar, but it stays on. I can dismiss, snooze or remove this event

if you want to delete it, keep in mind that this option is only available for events that you have permission to edit. Clicking this will remove the event from your calendar as well as the calendars of any invited guests. The event will be completely deleted.

If you do not have permission to edit it, you can only remove it - this will remove the event only from your calendar. The event will still exist on the calendars of other guests as well as the event organizer.