Unable to upgrade operator for CSV Pending in Openshift 4

Issue

• Why the old CSV is stuck in Replacing and the new one is Pending? For example:

  $ oc get csv 
  NAME                DISPLAY     VERSION   REPLACES          PHASE
  operator.v1.2.1     Operator    1.2.1                       Replacing
  operator.v1.3.0     Operator    1.3.0     operator.v1.2.1   Pending
  

• The serviceaccount for the new CSV result in status PresentNotSatisfied:

  $ oc get csv <new-csv-name> -o yaml
  [...]
        kind:     ServiceAccount
        message:  Service account is not owned by this ClusterServiceVersion
        name:     <service-account-name>
        status:   PresentNotSatisfied
       version:  v1
  [...]