Stars observed in Melotte 22 and suitable for the analysis of the origin of the trends. Left panel shows the CMD of literature members with stars observed in GALAH marked with coloured symbols. The right two panels show T_eff, log g, and iron abundance from the DR4. Additionally, the χ² of the spectral fitting in DR4 and S/N of the spectra are shown with colours. The isochrone in the left and bottom panels is a Padova isochrones with parameters from Cantat-Gaudin et al. (2020). Stars that might not be reliable for the re-analysis in the search of the origin of the trends are marked with crosses. The reasons why each star was rejected are given Table F.1.