Prior to beginning the Dekho upgrade process, backup and archive the existing configuration to create a fallback in case issues arise during the upgrade process. The Upgrade Procedure refers to a set of 'standard' upgrade tasks. Other non-standard upgrade procedures, called Version Specific Upgrades are occasionally necessary where the standard upgrade procedures are incapable of covering all upgrade requirements, like republishing maps or changing security settings.
The workflow steps for upgrading Dekho refers to the standard upgrade procedure. See Version Specific Upgrades to understand how to upgrade Dekho from a specific version.