How to delete billing reminders

I have three entries appearing in my Bill and Income Reminders section that I cannot delete. (I cannot skip them or edit them either.) When I try to delete one I get "Could not delete item." They are not linked to a biller. Two are from a closed account and one (Hulu) is a duplicate of a bill from a current account. Deleting the other Hulu reminder did nothing.

I even tried to trick the system by "paying" the bills, i.e., entering them into the register. That didn't do it. I followed guidance from two other posts that appeared to have the same problem but that advice didn't work.

Screenshots attached. You'll see that interestingly all three have the same entries in all the columns but the Payees and Amounts. I'm running R37.66 on Windows 11. Thanks.