Good day, I need some help, I’n new with these thing of LoRa and I try to made a gateway with rpi3 and dragino lora/gps hat v1.4, but when i try to register the gatewar on the page of TTN it give me the message
Could not register gateway
a gateway with id eui-b827ebffffe43c3d already exists
RPi info
SX1276 detected, starting.
Gateway ID: b8:27:eb:ff:ff:e4:3c:3d
Listening at SF7 on 902.300000 Mhz.
is it possible that you tried more then once to register ?
if I look here http://noc.thethingsnetwork.org:8085/api/v2/gateways/eui-b827ebffffe43c3d your gateway worked.
Good night, yes I tried some times without luck, but I change the Mac address of the rpi then it change me the info so I can get a eiu that wasn’t used on TTN 
I only change the last two digits of the Mac from 3d to d3
Thanks BoRRoz 
That device that you put on the link is another in Hermosillo, Sonora, Mexico, is the same city where I’m from but I don’t know why but RPi or device (gateway) has the same Mac that my RPi