What is a pre-requisite before upgrading Cloud Pak for Data System if it has a...

Delete the existing System_Name.yml file.

Run the upgrade-network-setup option with the upgrade command.

Run the /opt/ibm/appliance/platform/apos-comms/customer_network_config script before upgrading.

Ensure there is a System_Name.yml file with the custom network configuration and perform a back-up of the file.