Which actions should be completed before a package can be moved to another devhub?

1. We need to link client customer namespace to the new devhub org.
2. We need to remove error notification user from every package we want to migrate by running a command sfdx package update --package 0Ho00000000PACKAGE --error-notification-username ''
3. Open a Salesforce support case and wait for the Salesforce support team to complete the migration/transition.