@MrT10001 Thank you @arubislander and MrT1000

I am think of giving up , it's so boooring (10 days... 10DAYS, it's enough, for me so complicated it is) although I am learning about amazing tools and trics

Thank you for your responses guys !!

Now : no valid slot to boot
I could reinstall Android V9 (the good one, about that : the installer says Google Pixel 3a/3a XL (sargo) but I have a 3a XL and they put the "bonito" https://developers.google.com/android/images#bonito)

There is always some problem