OK I thing I discovered the reason of my problem, I realised that I have a space issue on root. (Even if I just installed Linux).
So I investigated and I get this in my projects :
84G /home/lucie/PROJETS/cv-corpus-6.1-2020-12-11
18G /home/lucie/PROJETS/fr.tar.gz
78M /home/lucie/PROJETS/DeepSpeech
Did I something wrong or it is normal that cv-corpus takes so much space ?
If so solution of my problem was just a cleaning space since beginning. I let it here in case other users meet the same error for this