Could upgrade cluster from 4.2.29 to 4.3.0-0.nightly-2020-04-20-084750 when set image-registry to Unmanaged

$ oc get co image-registry -o yaml 
apiVersion: config.openshift.io/v1
kind: ClusterOperator
metadata:
  creationTimestamp: "2020-04-21T06:47:24Z"
  generation: 1
  name: image-registry
  resourceVersion: "43363"
  selfLink: /apis/config.openshift.io/v1/clusteroperators/image-registry
  uid: f5547be1-839b-11ea-8ed1-02f7a755fd60
spec: {}
status:
  conditions:
  - lastTransitionTime: "2020-04-21T06:50:09Z"
    message: The registry configuration is set to unmanaged mode
    reason: Unmanaged
    status: "True"
    type: Available
  - lastTransitionTime: "2020-04-21T06:58:46Z"
    message: The registry configuration is set to unmanaged mode
    reason: Unmanaged
    status: "False"
    type: Progressing
  - lastTransitionTime: "2020-04-21T06:47:26Z"
    message: The registry configuration is set to unmanaged mode
    reason: Unmanaged
    status: "False"
    type: Degraded

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2020:1529

*** Bug 1691649 has been marked as a duplicate of this bug. ***