Leave Application broken since update to v14.82.1

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Since updating ERPNext to v14.82.1 Leave Application is broken.

When an Employee wants to add a Leave Application and saves it there is an error popping up stating: Invalid field name: prevent_self_leave_approval

I was only able to test it on two user accounts, one with Leave Approval level and one without. The one without is also an Expense Approver.

I looked in the Leave Applicatuon DocType but there is no prevent_self_leave_approval field. I don’t know where to find this setting. When searching the forum for this issue, I’ve encountered two old threads referring to Workflows, but we never used workflows.

UPDATE: when I want to select an old - already approved - leave application from the list, I get the same error and no page opens.