Linux puskom-ProLiant-DL385-Gen10 5.4.0-150-generic #167~18.04.1-Ubuntu SMP Wed May 24 00:51:42 UTC 2023 x86_64

//usr/share/glib-2.0/schemas/org.gnome.ControlCenter.gschema.xml

 <schemalist>
  <schema gettext-domain="gnome-control-center-2.0" id="org.gnome.ControlCenter" path="/org/gnome/control-center/">
    <key name="last-panel" type="s">
      <default>''</default>
      <summary>The identifier for the last Settings panel to be opened</summary>
      <description>
        The identifier for the last Settings panel to be opened. Unrecognised values
        will be ignored and the first panel in the list selected.
      </description>
    </key>
  </schema>
</schemalist>