Upgrade to v4.18.0-okd-scos.5 fails: The update cannot be verified...against keyrings: verifier-public-key-ci

[titou10titou10]

The upgrade from 4.18.0-okd-scos.4 to 4.18.0-okd-scos.5 fails with the following error

Retrieving payload failed version="4.18.0-okd-scos.5" image="registry.ci.openshift.org/origin/release-scos@sha256:2fcf0247f6ae48ea21c168f33782385d3752a12d0917e76b35223c4e6a702e91" 
failure=The update cannot be verified: unable to verify sha256:2fcf0247f6ae48ea21c168f33782385d3752a12d0917e76b35223c4e6a702e91 
against keyrings: verifier-public-key-ci

This seems to be a new bug similar to older bugs already seen in the past: #1706, #1618, #1729 ...
Using--forcebypass the check and the upgrade goes on...

oc adm upgrade --to-latest 
> fails
oc adm upgrade --clean
oc adm upgrade --to-latest --force
oc get clusterversion
NAME      VERSION             AVAILABLE   PROGRESSING   SINCE   STATUS
version   4.18.0-okd-scos.4   True        True          71s     Working towards 4.18.0-okd-scos.5: 129 of 901 done (14% complete), waiting on kube-controller-manager

[lweller]

The upgrade from 4.18.0-okd-scos.5 to 4.18.0-okd-scos.6 also fails for the same reason.