I'm working on a Roman numeral analysis of the Minuet in G Minor by Petzold. The piece is in the key of G minor. In measure 12, there is an accidental which changes the B flat to a B natural. I've determined a chord that matches the music, by sound, but I'm not sure how to label the triad. Do I label it as a triad in a different key or do I skip labeling it? The triad in question is a B natural, D, F triad. I've attached an image of the sheet in question below. Thanks,
EDIT: Sorry I didn't mention it and my original question, but you were all very attentive in pointing out that I did it in the wrong key. I am working on redoing my work so far... Thank you for all your answers!