With g++ 11.2.0 and Boost 1.74.0, std::shuffle() can't be used with boost::random::mt19937 (at least not the way it was used):
        error:  call to non-‘constexpr’ function ‘static boost::random::mersenne_twister_engine...
        => use std::mt19937 for each call of shuffle()
        WARNING: but a different seed is used ! To be fixed ! If not it won't be possible to get exactly the same results (by choosing a seed)