This guide will let you know how to turn a ghost Sim back to human (Death By Flies) in The Sims 4.
2. A white box will appear at the top left corner of the screen. Type in “testingcheats true” and hit enter to enable cheats.
3. Now type in “traits.remove_trait ghost_flies” and hit Enter on your keyboard. Press CTRL+Shift+C again to hide the cheat box.
4. You will see your sim get back to life.