Can't disable "Vote once per day" paid feature after downgrading to free account

I had upgraded to an Enterprise account for a month last year in order to use the "Vote once per day" feature. Now I'm on the Premium plan and want to clone last year's pollunit with that feature disabled until I upgrade again when voting occurs, but I can't uncheck that feature box whether or not the pollunit has recorded votes on it. On the pollunit with votes it says I can't disable it since votes are recorded and prompts me to delete them, but on the pollunit without votes it doesn't allow the box to be unchecked but provides no explanation in the tooltip.

Hi Dan,
This is obviously a bug in our system. Can you send the link to your PollUnit to philipp@pollunit.com?
Then we can do the cloning manually for you until the bug is fixed.
Kind regards
Philipp