the station name is derived from the MAC address of the ethernet port. in this case, the ethernet port no longer exists, since i will assume it got fried in the flood and is no longer able to be brought up.
in the case of no ethernet interface, the system defers to using the MAC address of the WiFi interface to derive the station name, which is what is happening here.
your station is connected to the server and forwarding data under the new name. i must say i’m impressed that your unit is still working after a water incident, this is not typically how electronics respond.