At the moment, it is not possible to change a location which is in the past. For example, when I was in homoffice yesterday spontaneously but forgot to change my location in Waldo to "Remote" and it still says that I was in the office, I can't change that afterwards.
I understand that it is not relavant for the system to work since past bookings are not relevant anymore. But maybe this could be a feature to implement in terms of metrics. Metrics would be more reliable and correct if it would be possible to change locations in the past to how they actually were. I am seeking a solution for all users and not for admins only (I am aware that admins can change that in the reservations tab in the admin portal).
The easiest way would simple tho make it editable in the calendar.