invalid column SQL

select  inv_mast.item_id, sum(qty_on_hand) qty_on_hand, max(invoice_date) latest_invoice_date from inv_mast
join inv_loc on inv_loc.inv_mast_uid = inv_mast.inv_mast_uid
full join p21_sales_history_report_view on inv_mast.inv_mast_uid = p21_sales_history_report_view.inv_mast_uid
where qty_on_hand > 0  and location_id <> 40 and latest_invoice_date <= DATEADD(YEAR,-2,getdate())
group by inv_mast.item_id