While upgrading the cluster from web-console the below warning message observed. 
~~~
Warning alert:Admission Webhook Warning
ClusterVersion version violates policy 299 - "unknown field \"spec.desiredUpdate.channels\"", 299 - "unknown field \"spec.desiredUpdate.url\""
~~~

There are no such fields in the clusterVersion yaml for which the warning message fired.

From the documentation here: https://docs.openshift.com/container-platform/4.16/rest_api/config_apis/clusterversion-config-openshift-io-v1.html 

It's possible to see that "spec.desiredUpdate" exists, but there is no mention of values "channels" or "url" under desiredUpdate.



Note: This is not impacting the cluster upgrade. However creating confusion among customers due to the warning message.

    4.16

Everytime    

    1. Install cluster of version 4.16.4
    2. Upgrade the cluster from web-console to the next-minor version
    3.
    

    Upgrade should proceed with no such warnings