1 mistake, incorrect assumption or missing data and we will mess up the only planet in solar system at least theoretically ok for terraforming atrempts, even if not ideal.

If we should seed planet (and we shouldnt at this point, we are still pretty much clueless in so many things), at least with something that produces O2. But we shouldnt anyway, 1 bad mutation and we will have maybe cyanide or trifluorides in atmosphere instead on top of current challenges.