422 Unprocessable Entity from DELETE

Hello, 

Upon user deletion we are getting 422 Unprocessable Entity from DELETE. Could you please tell us what the situation is? Has the behaviour changed? 

For example:

DELETE /api/v2/users/19821366895634 => 200 OK

DELETE /api/v2/deleted_users/19821366895634 => 422 Unprocessable Entity

{
    "error": "RecordInvalid",
    "description": "Record validation errors",
    "details": {
        "user_id": [
            {
                "description": "User Only one deletion request needed per user",
                "error": "DuplicateValue"
            }
        ]
    }
}