Daniel, I am still having the problem originally described. I do have the latest Hotspots and Matukio. Here are the steps to recreate the problem. I have 4 entries for "Music at Amber Falls Winer," only one of which I want to keep, and that is the one titled "Music at Amber Falls Winery-2" I tried to unpublish two of the unwanted items from the Eventlist screen, and got the 1241 error. However, when I returned to the Eventlist screen, one of them was unpublished one was not. Then I selected 3 of the Amber Falls items, and got the 1241 error again. I was directed back to the Control Panel, so I went there, and then accessed Matukio through the components dropdown menu item. Miraculously the 3 unwanted items were gone. So I am still receiving the error messages. You asked if I was trying to delete old events. I guess so. I am entering dates from September (when I was given the list and started entering the data and testing Matukio) and hope to be up to November by the time the weekend is over.
I will send you a login for my dev site via private ticket.
Thanks,
Pat