Hello, Tomek ,
This became possible, since most likely there is a fake tracker with the same ID, which was once entered into the system, but then deleted. But the fake device did not stop sending data to the application, that is, the configuration was not changed in it.
Just for information, we have 4 units with this ID in the system, and they are all in different parts of the world and on different accounts.
In this case, we recommend that you point your device to a different server and port.
To do this, change the device type to just Coban in the Common settings of the unit and then point your device to the new server and port you get after changing the device type.
It is necessary to do, to avoid such cases.