How long are activity data retained?
You can go to Settings > System and you have this configuration that indicates how long device states are kept:
But I set it to unlimited from the start!
Donât you find any events before a certain date?
I think I understand why: I changed the name of a device in zigbeemqtt and in Gladys, and this deletes all the data from the old name, since I have to create a new device.