based on LCG_108_ATLAS_7 (MG3.5.11,Pythia8.312,Powheg-08-09) https://gitlab.cern.ch/atlas/athena/-/merge_requests/83205 Purge unstable particles from Pythia - Angantyr https://gitlab.cern.ch/atlas/athena/-/merge_requests/83257 do not alter list of generators https://gitlab.cern.ch/atlas/athena/-/merge_requests/83253 LCG_108_ATLAS_7 switch to a new LCG layer