Hi. I bought "Mozart - Most Popular 21 Pieces to Play on Piano". Currently I'm learning Allegretto in G Major from the book. It is said to be Mozart's solo arrangement for piano.
However, this section confuses me.

I'm meant to play a D in the Treble Clef, and a D in the Bass Clef. But they're the same note! (I think.) So, what do I do? Why would the book bother to publish both D's if I can only physically play one? Am I reading the sheet wrong or am I meant to choose which hand I want to use in that section?