Broken default hoiday in v16

There is no field in employee document for default holiday

I have this error when y try to send a leave application form

Also, I try to set up the default holiday at employee list

So I roolback to v15 with a previous backup

And here it has the default holiday list no set up required because was already configured

I’m also facing the same issue. Unfortunately, I cannot rollback to a V15.
Tried to do a data import and change the holidays list to the current holidays list on employees but not working. Tried to remove with data import also but not permitted.
Did anyone find the solution ?

Resolved on my side by deleting all of the holidays assigned to employees here.
Use the awesome bar to search for it because it is easy to find.

After that, add a new assignment to a company for example.