How to return to earlier bluetooth settings after entering a hasardous command

Hi!

I'm on Big Sur 11.7.10 on a Macbook pro.

I wrote the the command line:

sudo defaults write bluetoothaudiod "Enable AptX codec" -bool true

But the bluetooth doesn't work correctly now. The sound is cut every 1 second. I realised after that my external bluetooth receiver device was not compatible.

Then I wrote:

sudo defaults write bluetoothaudiod "disable AptX codec" -bool true

Same problem.

Then I wrote: sudo defaults write bluetoothaudiod "Enable AptX codec" -bool false

Always the same problem.

Somebody has a clue?

I thank you in advance.