Unable to delete recurring Calendar events using Script Editor (AppleScript)

tell application "Calendar"
	set destinationCalendar to calendar DestinationCalendarName
	-- Clear the destination calendar
	log "Deleting all events from " & DestinationCalendarName

	set oldEvents to get every event of calendar DestinationCalendarName

	repeat with anEvent in oldEvents

		delete anEvent

	end repeat
end tell

I am using the script above to try remove all events from an Apple iCloud calendar. I used a script to put them there. This script successfully removes regular entries, but not recutting ones.

Any ideas?