Right after the upgrade of OSS component to version 21.9, you need to take the following steps.

1. On a computer with access to Kubernetes cluster where your CloudBlue Commerce installation is deployed, enter to the OSS pod. Below is the example of a command to do that:
   kubectl -n NAMESPACE exec -ti oss-node-0 bash
2. Run the following command on the pod:

   # python
   >>> from poaupdater import openapi
   >>> api=openapi.OpenAPI()
   >>> api.pem.APS.addBrandingTemplateGroups()

3. Wait for the operation to complete. Time required to complete the operation directly depends on the number of resellers on the installation.