Custom schedule not working

Hey guys,

I want to make a schedule (open hours) for a listing.
And I thought to add closed option.
When closed is true, it will change default value to closed.
All good. I even deleted the database entries that said NUMBER only and added new ones with TEXT.

If I activate the closed option, it will not register the listing.
No error, no notification… just scrolls up there at the page where closed is selected.
If I click again and make it false, so instead of closed it will appear numbers, it will work.
Any ideas why?
Do you guys have any other solution for such a schedule/opening hours?
Thanks!