Downgrade 10.7 -> 9.2: Error starting

Hello,

I'm French so I speak very little English but I come here to find answers to my questions.

Console : Old 3DS
Version : 10.7.0-32E
SD card : 16 GB
Access to Homebrew : Cubic Ninja (Sky3DS +)

I already did a downgrade from my console and it worked. But I came back to the latest version. I wish downgrade yet to find a private header and to install CIA. The trouble is that I have an error code after the downgrade of the CIA files are installed when starting the console. Then when I...

Downgrade 10.7 -> 9.2: Error starting