Unable to delete system volume in private cloud

hi,

why can't delete my system volumes with error. checked has no more VM, snaps, etc.

use postman to delete with error. ps check my postman.

use python script to delete with error. ps check my python code

import requests

get_token_url = "https://iam-apigateway-proxy.domain.com/v3/auth/tokens"

body = {
    "auth": {
        "identity": {
            "methods": [
                "password"
            ],
            "password": {
                "user": {
                    "domain": {
                        "name": "XXXXX"
                    },
                    "name": "XXXXX",
                    "password": "XXXXX"
                }
            }
        },
        "scope": {
            "project": {
                "id": "cd088007d3b84e7fa894478e6fe667c4",
                "domain": {
                    "name": "XXXXX"
                }
            }
        }
    }
}

# POST to the API
results = requests.post(get_token_url, json=body, verify=False)


token = results.headers['X-Subject-Token']

#Deletion

volume_id = [
    'c3b803ee-f1ab-428d-bc55-01b380c36d49',
    '065ba0b3-959a-4dc0-af23-17b8a1099367',
    'b282ea13-5e24-48fb-b7e2-84fce0973621',
    'aa87fc71-ae1b-47ee-82fc-bcd73a59538d',
    'a72cc934-473e-4cde-8eb0-743ca058e350'

]

delete_url = "https://evs.domain.com/v2/cd088007d3b84e7fa894478e6fe667c4/volumes/"
headers = {
    'content-type': "application/json",
    'X-Auth-Token': token
}
for id in volume_id:
    r = requests.delete(delete_url + id, headers=headers, verify=False)
    print(r.text)


error with cloud portal can't delete sys vol.
 



 Tks