This bug has existed in BO v6 ever since it came out.
When starting a new report, from the data menu, select “New Data Provider”. The screen that now appears, has one radio button.
Why is this radio button here… it does not serve a purpose, since creating a query based on another one, implies that you already created one. If you check it, you cannot uncheck it.
The only thing that works is to click the Begin button.