kube-storage-version-migrator has no priorityClassName set, but should as operand in openshift-* namespace.
Verified in latest 4.8.0-0.nightly-2021-04-28-005607 env: $ oc get po -n openshift-kube-storage-version-migrator -o yaml | grep priorityClassName priorityClassName: system-cluster-critical
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 (Moderate: OpenShift Container Platform 4.8.2 bug fix and security update), 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/RHSA-2021:2438