If you add an empty section player (by pressing Shift-Alt-P in Setup mode but not selecting an instrument in the picker, just press Esc) you can just drag the piano instrument from its original solo player to the empty section player.
If you add an empty section player (by pressing Shift-Alt-P in Setup mode but not selecting an instrument in the picker, just press Esc) you can just drag the piano instrument from its original solo player to the empty section player.