Great question — answering as the UphillTech team:
Unfortunatly, today (in 2024), the sample data are automatically loaded with the bin/console sylius:install:database . My workaround is to force a fixture-suite that do not exists : bin/console sylius:install:database --fixture-suite=nope then I need to finish the installation bin/console sylius:install:setup
Full answer by Neekobus: https://stackoverflow.stackexchange.com/a/77971293 (CC BY-SA 3.0).
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