Where is Interest coming from?

I have one brokerage account that I imported a consolidated 1099 (Div, Int, B) form from.  It says there was no interest earned.  But the summary for my NJ state tax return says I earned $307 in interest.  Where is this coming from? The closest thing to $307 on that 1099 is a value of $306.42 under “Total Market Discount” (1099-B) related to sale of US Treasury bonds.  Since NJ does not tax gains from sale of US Treasuries, I don’t understand why this amount is being taken as a taxable amount. 

 

I have not uploaded any other 1099 forms.