I want to do this thing without use more layers, it's very easy with an old program like micrografx (w95!)
Selection:
https://i.postimg.cc/q7dpF8xt/1.png
Paste, all overwrote
https://i.postimg.cc/tgt9GYBB/al-pegar-sobreescribe.png
Using the old micrografx photomagic with the option of "only selected part" (doesn't support alpha channel)
https://i.postimg.cc/YCQvj2XW/3.png