How do i partially cancel the Sales order line with backordered status
ex.
Sales order 001
line 1 : item A , quantity 30
shipping form
line 1: item A , quantity 10 , line status: stage/picked
line 2: item A , quantity 10 , line status: stage/picked
line 3: item A , quantity 10 , line status: backordered
How do i partially cancel the SO line with backordered status