Creation of profile with email id failing

Using the V2 api I could call the following to add a profile to a list.

    url = "{0}list/{1}/members".format(endpointURL, newsletterListId)
    reqJson = {
        "api_key": appConfig.KALVIYO_APIKEY,
        "profiles": [
            {
                "email": email
            }
        ]
    }
    r = requests.post(url, json=reqJson)

I am upgrading per the depreciation warning notifications.  The following taken from this documentation fails:

    url = "{0}lists/{1}/relationships/profiles/".format(endpointURL, newsletterListId)    

    payload = { 
        "data": [
            { 
                "type": "profile", 
                "email": email 
            }
        ] 
    }

    headers = {
        "accept": "application/json",
        "revision": "2024-02-15",
        "content-type": "application/json",
        "Authorization": "Klaviyo-API-Key {0}".format(appConfig.KALVIYO_APIKEY)
    }

    response = requests.post(url, json=payload, headers=headers)

With error message:

{"errors":[{"id":"d871c72d-3c4e-46c6-a30a-66d526822741","status":400,"code":"invalid","title":"Invalid input.","detail":"The payload provided in the request is invalid.","source":{"pointer":"/data"},"meta":{}}]}

If I use the property name ‘id’ per the documentation (i.e. not ‘email’ as in the example above) I get this error:

{"errors":[{"id":"e4685613-85cd-45e6-921f-386e2543b537","status":400,"code":"invalid","title":"Invalid input.","detail":"Invalid profile IDs: {'doug@myemailaddress.com'}","source":{"pointer":"/data/"}}]}

I don’t store the klavio profile ID in our database, and so don’t actually have access to it.

How do I get this working, please?