It is occasionally necessary for Home Manager to change configuration defaults in a way that is incompatible with stateful data. This could, for example, include switching the default data format or location of a file.

The state version indicates which default settings are in effect and will therefore help avoid breaking program configurations. Switching to a higher state version typically requires performing some manual steps, such as data conversion or moving files.

one of "18.09", "19.03", "19.09", "20.03", "20.09", "21.03", "21.05", "21.11", "22.05", "22.11", "23.05"