Could not remove event

Hello, I can’t delete the event I added and the event was duplicated. When you delete an event, it says that the event could not removed. How do i have to proceed? Thank you

try to update the event by setting future dates and then delete the event.

Any change in the event will write:

    • Could not save event to machine Raspberry Pi

Did you find a solution for this? I am having the same issue removing events on a pi.
I tried all suggested answers
Thanks