efuse on arduino

[quetzal]

Hello,

I've just bought new arduino nano.
The efuse on them is not
0xda
0xff
0x5
0xf


But
0xda
0xff
0xfc
0xcf

So i've bad efuse on pypilot.
I've tried both with usbasp or arduino isp, I can change the efuse, for example for 0xFE, but not for 0x5 or 0x4 like in the readme.
So i've bad fuses error.

Regarding this https://forum.arduino.cc/index.php?topic=418607.0 it seem that 0xfd is exactly like 0x5. So i've set it to 0xfd.

For the moment, i've run with
#define DISABLE_TEMP_SENSE    // if no temp sensors avoid errors
#define DISABLE_VOLTAGE_SENSE // if no voltage sense
#define DISABLE_RUDDER_SENSE  // if no rudder sense

But in the pypilot client, i've the SYNC OVERCURRENT BAD_FUSES
Is it because of my fuse ? I've spend almost 2 hours on this problem without solution, i don't know why fuses are so important but do you think you can edit pypilot to accept 0xfd ?

Thanks !