A website can be a company's gateway to making sales, generating leads or getting customer engagement. In some companies, zero-time is vital. If the website is down for maintenance while it's being upgraded, it can cost a company hundreds, or even thousands of pounds in lost revenue. One way to create zero time deployments is to do the upgrades offline. In most organisations of a certain size, you will have multiple environments, UAT, Staging, Live. Having these different environments is vital for business continuity but poses a problem when we upgrade. How do you update the database for each environment? When you do an upgrade, Nuget will update your files and then when you load your site, the Umbraco database upgrade wizard will display. After logging in, you see the upgrade wizard: After you upgrade, the upgrade wizard will not be triggered again. When you deploy your files to a new environment your site will break. Instead, you can force Umbraco to re-load the upgrade wizard.
How To Force The Upgrade Wizard To Display
Open up your web.config file and in your section you should find a key called 'umbracoConfigurationStatus':
To force the upgrade wizard to display again, you need to change the value to the version you upgraded to.
Now you should see the upgrade wizard again.