Getting 422 Invalid Attribute when trying to purchase a number

[colinmbr]

I've verified the number is available and I'm getting below error

curl -L 'https://project.signalwire.com/api/relay/rest/phone_numbers' \
-H 'Content-Type: application/json' \
-H 'Accept: application/json' \
-H 'Authorization: Basic xxx' \
-d '{
  "number": "+14809561998"
}'

{
    "errors": [
        {
            "detail": null,
            "status": "422",
            "title": "Invalid Attribute",
            "code": "422"
        }
    ]
}

However, I also tried +19254809561 and got

{
    "id": "c1ac439e-8d07-462d-9f07-c3771a55ff56",
    "name": null,
    "number": "+19254809561",
    "capabilities": [
        "voice",
        "fax",
        "sms",
        "mms"
    ],
    "number_type": "longcode",
    "e911_address_id": null,
    "created_at": "2024-02-07T10:21:01Z",
    "updated_at": "2024-02-07T10:21:01Z",
    "next_billed_at": "2024-02-07T10:21:01Z",
    "call_handler": "laml_webhooks",
    "call_receive_mode": "voice",
    "call_request_url": null,
    "call_request_method": null,
    "call_fallback_url": null,
    "call_fallback_method": null,
    "call_status_callback_url": null,
    "call_status_callback_method": null,
    "call_laml_application_id": null,
    "call_dialogflow_agent_id": null,
    "call_relay_context": null,
    "call_relay_application": null,
    "call_relay_connector_id": null,
    "call_sip_endpoint_id": null,
    "call_verto_resource": null,
    "call_video_room_id": null,
    "call_relay_script_url": null,
    "message_handler": "laml_webhooks",
    "message_request_url": null,
    "message_request_method": null,
    "message_fallback_url": null,
    "message_fallback_method": null,
    "message_laml_application_id": null,
    "message_relay_context": null,
    "country_code": "US"
}

When trying to purchase the same number again I got

{
    "errors": [
        {
            "detail": "Number Purchase failed. Number already exists.",
            "status": "422",
            "title": "Invalid Attribute",
            "code": "422"
        }
    ]
}