Cluster upgrade from 4.15.35 to 4.16.15 failed

    The master and worker MCPs are degraded with the below error:

$ oc get mcp worker -o yaml

  - lastTransitionTime: "2024-11-08T09:29:11Z"
    message: 'Failed to render configuration for pool worker: could not generate rendered
      MachineConfig: Ignoring MC 99-worker-generated-registries generated by older
      version bb5ac68843493c4adbfd52b2d008e78654f26912 (my version: 6a425abbe5e330f0e7bc0849f4927d4c55d0c9e5)'
    reason: ""
    status: "True"
    type: RenderDegraded

$ oc get mcp master -o yaml

  - lastTransitionTime: "2024-11-08T09:29:11Z"
    message: 'Failed to render configuration for pool master: could not generate rendered
      MachineConfig: Ignoring MC 99-master-generated-registries generated by older
      version bb5ac68843493c4adbfd52b2d008e78654f26912 (my version: 6a425abbe5e330f0e7bc0849f4927d4c55d0c9e5)'
    reason: ""
    status: "True"
    type: RenderDegraded


There is only single machiconfig present for master and worker MCP:

$ oc get mc | grep registries
99-master-generated-registries                                                  bb5ac68843493c4adbfd52b2d008e78654f26912   3.4.0             3y
99-worker-generated-registries                                                  bb5ac68843493c4adbfd52b2d008e78654f26912   3.4.0             3y

    Update stucks on machine-config CO

    Upgrade should continue without any issue.

    Will add the must-gather report