Downgrade
Learn how to revert to a downgrade level of PowerShell Universal.
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Learn how to revert to a downgrade level of PowerShell Universal.
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In some scenarios it may be required to roll back the version of PowerShell Universal. This could be due to a feature change or bug that affects the system in a way too impactful to continue with the version. We validating a version in a development or quality assurance environment before upgrading in production to avoid having to perform a downgrade.
Downgrading can be complicated and error prone. We recommend restoring from a backup or snapshot instead of downgrading.
Downgrading the configuration files will require removing or altering the .universal repository files to remove or rename new parameters. New cmdlets will be ignored by PowerShell Universal. If a cmdlet was renamed, it may have to be updated as well. You will need to refer to the to see which cmdlets have changed in each version.
Major versions may include breaking changes. Minor versions may have additional cmdlets or parameters but will not have any breaking changes.
You can find information about each configuration file in the .
It is much easier to restore from a backup of the configuration files before the upgrade rather than manually updating files.
Restoring the database to a previous version requires downgrading the schema. This can be accomplished with . Using the schema command, you will be able to select the down-level version.
Downgrading the database schema can be a destructive operation. You may remove tables and columns that contain data. Always backup a database before performing these operations.
Below is an example of downgrading the schema of a SQLite database to version 5.3.0. You will need to stop the PowerShell Universal services before doing so.
You can downgrade a nightly build version of the database to a stable version of the database to allow for an upgrade to the stable build of the target version. You will lose any data found in new columns or tables.
Downgrading the application files is typically a simple process and depends on how you installed the product. You will need to perform the configuration file and database downgrades before performing the application downgrade.
To downgrade an MSI installation, you will need to first uninstall the current version. PowerShell Universal will not allow you to run a downgrade. After the uninstall is complete, perform an installation of the target version.
To downgrade a ZIP installation, simply delete the PowerShell Universal application files. Once the directory is clear unzip the target version's ZIP into the installation directory. Ensure that you run Get-ChildItem -Recurse | Unblock-File after doing so.
Similar to the ZIP installation, remove the old version's files and unzip and unblock the target version's files. Ensure that the web site and App Pool are stopped before attempting so.