First AthGeneration release. Contains the generators versions consistent as 21.6.60. It is based on LCGpython3_ATLAS_6 Genser layer. Will be used for validation of Herwig7, Pythia8,EvtGen,Epos. MG needs another release with new version. Sherpa has problems with HepMC. Powheg, Starlight,Superchic etc. do not work yet.