Create or Update Profile API is not clearing out fields when passing null

Hello.

I’m using the Create or Update Profile API method (reference) on the revision v2024-06-15 and it’s not clearing out a field when passing null to it, despite what the mentioned documention says.

Note that setting a field to null will clear out the field, whereas not including a field in your request will leave it unchanged.

It doesn’t work on the latest stable version v2025-01-15 as well.

Am I doing something wrong? Or is it not really working as supposed?

See real example below. Some information has been supressed.

Request

{
  "RequestMethod": "POST",
  "RequestUrl": "https://a.klaviyo.com/api/profile-import/",
  "RequestBody": {
    "data": { "type": "profile", "attributes": { "properties": {}, "email": "test@example.com", "title": null } }
  }
}
 

Response
{
  "data": {
    "type": "profile",
    "id": "<id>",
    "attributes": {
      "email": "<email>",
      "phone_number": null,
      "external_id": null,
      "anonymous_id": null,
      "first_name": null,
      "last_name": null,
      "organization": null,
      "locale": null,
      "title": "test title",
      "image": null,
      "created": "2025-02-25T17:50:38+00:00",
      "updated": "2025-02-26T14:40:30.073777+00:00",
      "last_event_date": null,
      "location": {
        "zip": null,
        "region": null,
        "city": null,
        "latitude": null,
        "longitude": null,
        "address1": null,
        "country": null,
        "address2": null,
        "timezone": null,
        "ip": null
      },
      "properties": {
        "customproperty": "test"
      }
    },
    "relationships": {
      "lists": {
        "links": {
          "self": "https://a.klaviyo.com/api/profiles/<id>/relationships/lists/",
          "related": "https://a.klaviyo.com/api/profiles/<id>/lists/"
        }
      },
      "segments": {
        "links": {
          "self": "https://a.klaviyo.com/api/profiles/<id>/relationships/segments/",
          "related": "https://a.klaviyo.com/api/profiles/<id>/segments/"
        }
      },
      "conversation": {
        "links": {
          "self": "https://a.klaviyo.com/api/profiles/<id>/relationships/conversation/",
          "related": "https://a.klaviyo.com/api/profiles/<id>/conversation/"
        }
      }
    },
    "links": {
      "self": "https://a.klaviyo.com/api/profiles/<id>/"
    }
  },
  "links": {
    "self": "https://a.klaviyo.com/api/profile-import/"
  }
}