OCI-41440
unsupported session template usage
Cause
An application attempted to apply a template produced by a newer server on a server that does not support session templates.
Action
Do not configure a service to use session templates if any database providing the service does not support templates. Either upgrade those databases, or change the service configuration to one that does not use session templates. For the common Data Guard (DG) case, do not enable RAC two_stage rolling until all databases in the same DG topology have been upgraded to software that supports session templates.