wpkg --force-downgrade ...

The validation tests of the installation process checks whether the version of the package being installed is larger or equal to the currently installed version (this validation does not apply if the validation is for a package that is not already installed.) If the version of the package that you are trying to install is smaller then it is an error.

The --force-downgrade option can be used to allow installing an older version. Note that there are potential problems with installing older versions, especially, in most cases the installation and removal scripts will not have been tested in that direction. In other words, it may not do what would otherwise be expected.

The use of this option is not recommended.


The --no-force-all, --refuse-all, --no-force-downgrade, --refuse-downgrade all cancel this feature whatever the position of the different options on the command line.