Okay, so it sounds like someone else already claimed this gateway. Since you already have the CLI set up, you can look up the gateway registration with the following command (replace the EUI with the actual one):
$ ttn-lw-cli gateways search --eui-contains 58A0CBFFFExxxxxx
// output:
[{
"ids": {
"gateway_id": "some-gateway-id",
"eui": "58A0CBFFFExxxxxx"
},
// ...
}]
You can then run the following command to find out who registered this gateway (replace the ID with the gateway_id
in the output of the previous command):
$ ttn-lw-cli gateways collaborators list some-gateway-id
// output:
[{
"ids": {
"user_ids": {
"user_id": "some-user-id"
}
},
// ...
}]
Now that you know who claimed the gateway, you should be able to reach out to them (they should typically have the same username here on the forum) and ask them to delete the gateway if it’s not theirs.