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I too am looking into how to remove the sample data from my database.
I have a theme installed and when I try to add products they do not show up in the frontend.
The new catagories show up on the frontend and the new products show up in the backend.
But the new products do not show up in the front end.
So, I want to delete the product catalog from the database and start fresh.
on a fresh install of v22.214.171.124 + template + sample data