Can't register Gateway - EUI is still in use

The other details, even the country, are very standard given the type of gateway, and the location is given by the built-in GPS? So I doubt if any of those details have ever been entered in TTN Console by you.

Given its description, it may be the same owner as https://www.thethingsnetwork.org/gateway-data/gateway/eui-60c5a8fffe7663b4 and https://www.thethingsnetwork.org/gateway-data/gateway/eui-ac1f09fffe00ac38:

{
  "eui-60c5a8fffe7663b4": {
    "id": "eui-60c5a8fffe7663b4",
    "description": "ICT Production RAK7258 EU868 Test Gateway",
    "attributes": {
      "antenna_model": "EU868 Plan OEM Supplied White Antenna",
      "brand": "RAKwireless",
      "frequency_plan": "EU_863_870",
      "model": "7258",
      "placement": "indoor"
    }
  }
}
{
  "eui-ac1f09fffe00ac38": {
    "id": "eui-ac1f09fffe00ac38",
    "description": "ICT Production RAK7258 US915 Test Gateway",
    "attributes": {
      "antenna_model": "Omni Indoor - US902-928 Plan Setting",
      "brand": "RAKwireless",
      "frequency_plan": "US_902_928",
      "model": "7258",
      "placement": "indoor"
    }
  }
}

Despite the different actual brand, given the RAK7258 in all descriptions, and given the 3 different frequency plans, this may even be the RAK factory that makes those? Probably not, but contacting RAK won’t hurt.

So indeed: