Received income from discounted loans, can't uncheck?

[untuit]

In Other Interest and Dividends,

Received income from discounted loans or had foreign back accounts or trusts

was already checked when this form opened. I cannot uncheck it. I don't have foreign bank accounts. I did import items from my brokerage, does the pre-checked box mean one of those transactions was automatically categorized in one of those ways? I don't have a clue re whether any transaction might have fallen into either of these categories. Oddly I can still check "None of the above", and if I do, the auto-checked item remains checked?

[untuit]

Aha I see there is an OID entry in the imported documents list so I guess that's it.