Partially Installed Contents Can Be Removed From The System Settings Applet [best] Info

Declutter Your PC: How to Remove “Partially Installed” Apps from Settings

Final Thoughts: Keep It Clean

  1. Open System Settings.
  2. Go to ApplicationsSoftware Management (which launches Discover, KDE’s package GUI).
  3. In Discover, click on Installed and look for any packages marked with "Broken" or "Incomplete."
  4. Select "Remove" to purge the partial contents.

What the message means (plain terms)

Communication tips for support teams