az resource update fails to add ip filter rules of an IotHub

[joe-agent]

Describe the bug

Hi I would like to add IP filter rules to IotHub, which has its Public network access configured to All networks using az cli.
See the image below.

I need az cli command to change from All networks to Selected IP ranges

When I follow the documentation to add new IP filter, I always get an error message saying

(400059) Request body validation failed. If you contact a support representative please include this correlation identifier: 7c8311d2-683e-43d1-8de1-3e19c72251a5, timestamp: 2025-06-10 11:14:04Z, errorcode: IH400059

Related command

az resource update -n $iotHubName -g $resourceGroup --resource-type Microsoft.Devices/IotHubs --add properties.networkRuleSets.ipRules "{"action":"Allow","filterName":"filterName","ipMask":"10.39.6.128/25"}"

Errors

(400059) Request body validation failed. If you contact a support representative please include this correlation identifier: 7c8311d2-683e-43d1-8de1-3e19c72251a5, timestamp: 2025-06-10 11:14:04Z, errorcode: IH400059.
-43d1-8de1-3e19c72251a5, timestamp: 2025-06-10 11:14:04Z, errorcode: IH400059.
Code: 400059
Message: Request body validation failed. If you contact a support representative please include this correla-43d1-8de1-3e19c72251a5, timestamp: 2025-06-10 11:14:04Z, errorcode: IH400059.

Issue script & Debug output

debug log.txt

Expected behavior

I would expect the az resource update adds IP ranges to the Iot Hub network access

Environment Summary

azure-cli 2.72.0 *

core 2.72.0 *
telemetry 1.1.0

Extensions:
azure-iot 0.26.0
gallery-service-artifact 1.0.0b1

Dependencies:
msal 1.32.3
azure-mgmt-resource 23.1.1

Python location 'C:\Program Files\Microsoft SDKs\Azure\CLI2\python.exe'
Config directory 'C:\Users\E1252566.azure'
Extensions directory 'C:\Users\E1252566.azure\cliextensions'

Python (Windows) 3.12.8 (tags/v3.12.8:2dc476b, Dec 3 2024, 19:30:04) [MSC v.1942 64 bit (AMD64)]

Legal docs and information: aka.ms/AzureCliLegal

Additional context

No response

[azure-client-tools-bot-prd]

Hi @joe-agent,

2.72.0 is not the latest Azure CLI(2.74.0).

If you haven't already attempted to do so, please upgrade to the latest Azure CLI version by following https://learn.microsoft.com/en-us/cli/azure/update-azure-cli.

[yonzhan]

Thank you for opening this issue, we will look into it.

[joe-agent]

Hi @joe-agent,

2.72.0 is not the latest Azure CLI(2.74.0).

If you haven't already attempted to do so, please upgrade to the latest Azure CLI version by following https://learn.microsoft.com/en-us/cli/azure/update-azure-cli.

Still the same outcome even after upgrading az cli to the latest one