RH-SSO 7.6.3 operator failing to deploy postgresSQL pod

1. Issue description

When trying to deploy RH-SSO 7.6.3 operator, the posgresSQL pod is not coming up

2. Troubleshooting done

oc get pods
NAME READY STATUS RESTARTS AGE
keycloak-0 0/1 Running 3 (5m20s ago) 23m
keycloak-postgresql-78fbd5bd6d-qq2rg 0/1 ImagePullBackOff 0 3m8s
rhsso-operator-68dc844487-wnr6q 1/1 Running 0 25m

The event log trace shows:

Normal AddedInterface 3m39s multus Add eth0 [10.217.0.79/23] from openshift-sdn
Normal Pulling 2m12s (x4 over 3m39s) kubelet Pulling image "registry.access.redhat.com/rhscl/postgresql-10-rhel7:1"
Warning Failed 2m9s (x4 over 3m37s) kubelet Failed to pull image "registry.access.redhat.com/rhscl/postgresql-10-rhel7:1": rpc error: code = Unknown desc = Source image rejected: Running image docker://registry.access.redhat.com/rhscl/postgresql-10-rhel7:1 is rejected by policy.
Warning Failed 2m9s (x4 over 3m37s) kubelet Error: ErrImagePull
Warning Failed 107s (x6 over 3m37s) kubelet Error: ImagePullBackOff

The image registry.access.redhat.com/rhscl/postgresql-10-rhel7:1 does not exist

3. About postgresql-10 image

It is defined within redHat catalog at URL

https://catalog.redhat.com/software/containers/rhscl/postgresql-10-rhel7/5aa63541ac3db95f196086f1?container-tabs=gti

The way to import is:
oc import-image rhscl/postgresql-10-rhel7:1-173 --from=registry.redhat.io/rhscl/postgresql-10-rhel7:1-173 --confirm

4. About postgres pod
oc edit deployment.apps/keycloak-postgresql

• name: POSTGRESQL_DATABASE
  value: root
  image: registry.access.redhat.com/rhscl/postgresql-10-rhel7:1
  imagePullPolicy: Always

===> It is pointing to an image that does not exist.