If you mean on the test case I created based on the templates - I did and the problem does not reproduce. If you mean on the runtime project, I cannot do that since not all our identifiers are set up to use identity generation strategy. Our project uses hibernate.id.new_generator_mappings=true - is there some detailed documentation as to what this property controls and what are the recommended use-cases for it - especially in a "mixed" set-up like ours... ?