Résumé : We noticed that the dilution factors, f , reported in Table 2 of our paper (Choplin et al. 2021) were wrongly estimated. The new values, as provided in Table 1 of this erratum, are significantly larger than initially reported. We now find 0:68 < f < 0:98, while in our original paper values of 0:15 < f < 0:26 were quoted. The agreement between models and observation (in terms of chemical abundances) is not affected by the new values of the dilution factor, as seen in Table 1, where the updated X2min do not differ by more than 3 % from the previous values.