Chemical abundance ratios [Ba/Y] in both LTE (blue contours) and NLTE (red contours) as a function of [Fe/H] (LTE and NLTE, respectively), for 187 stars (left). Error bars correspond to mean uncertainties in LTE and NLTE. Only NLTE [Ba/Y] (red contours) together with Gaia-ESO sample used by Lian et al. (2023), as well as one-zone chemical evolution models with different yields prescriptions (right).