Calendar Reminder for past appointment

Hi,

I am running eMClinet 8.2.1473 on Windows 10 21H1.
I have since few weeks, two reminders for past appointment which at each opening are notified by Windows, I cannot close these reminders, I tried closing the reminder, reject, accept, erase, in each appointment, I selected no reminder.
But the notification still present…

Any idea for this issue?