old_contents: import frappe
  from frappe import _
  from erpnext.stock.utils import get_bin
  
  def execute():
  	po_item = list(frappe.db.sql(("""
  		select distinct po.name as poname, poitem.rm_item_code as rm_item_code, po.company
  		from `tabPurchase Order` po, `tabPurchase Order Item Supplied` poitem
  		where po.name = poitem.parent
  			and po.is_subcontracted = "Yes"
  			and po.docstatus = 1"""), as_dict=1))
  	if not po_item:
  		return
  
  	company_warehouse = frappe._dict(frappe.db.sql("""select company, min(name) from `tabWarehouse`
  		where is_group = 0 group by company"""))
  
  	items = list(set([d.rm_item_code for d in po_item]))
  	item_wh = frappe._dict(frappe.db.sql("""select item_code, default_warehouse
  		from `tabItem` where name in ({0})""".format(", ".join(["%s"] * len(items))), items))
  
  	# Update reserved warehouse
  	for item in po_item:
  		reserve_warehouse = get_warehouse(item.rm_item_code, item.company, company_warehouse, item_wh)
  		update_res_warehouse = frappe.db.sql("""update `tabPurchase Order Item Supplied`
  			set reserve_warehouse = %s
  			where parent = %s and rm_item_code = %s
  		""", (reserve_warehouse, item["poname"], item["rm_item_code"]))
  
  	# Update bin
  	item_wh_bin = frappe.db.sql(("""
  		select distinct poitemsup.rm_item_code as rm_item_code, 
  			poitemsup.reserve_warehouse as reserve_warehouse
  		from `tabPurchase Order` po, `tabPurchase Order Item Supplied` poitemsup
  		where po.name = poitemsup.parent
  			and po.is_subcontracted = "Yes"
  			and po.docstatus = 1"""), as_dict=1)
  	for d in item_wh_bin:
  		stock_bin = get_bin(d["rm_item_code"], d["reserve_warehouse"])
  		stock_bin.update_reserved_qty_for_sub_contracting()
  
  def get_warehouse(item_code, company, company_warehouse, item_wh):
  	reserve_warehouse = item_wh.get(item_code)
  	if frappe.db.get_value("Warehouse", reserve_warehouse, "company") != company:
  		reserve_warehouse = None
  	if not reserve_warehouse:
  		reserve_warehouse = company_warehouse.get(company)
  	return reserve_warehouse
new_contents: import frappe
  from frappe import _
  from erpnext.stock.utils import get_bin
  
  def execute():
  	po_item = list(frappe.db.sql(("""
  		select distinct po.name as poname, poitem.rm_item_code as rm_item_code, po.company
  		from `tabPurchase Order` po, `tabPurchase Order Item Supplied` poitem
  		where po.name = poitem.parent
  			and po.is_subcontracted = "Yes"
  			and po.docstatus = 1"""), as_dict=1))
  	if not po_item:
  		return
  
  	frappe.reload_doc("buying", "doctype", "purchase_order_item_supplied")
  	company_warehouse = frappe._dict(frappe.db.sql("""select company, min(name) from `tabWarehouse`
  		where is_group = 0 group by company"""))
  
  	items = list(set([d.rm_item_code for d in po_item]))
  	item_wh = frappe._dict(frappe.db.sql("""select item_code, default_warehouse
  		from `tabItem` where name in ({0})""".format(", ".join(["%s"] * len(items))), items))
  
  	# Update reserved warehouse
  	for item in po_item:
  		reserve_warehouse = get_warehouse(item.rm_item_code, item.company, company_warehouse, item_wh)
  		update_res_warehouse = frappe.db.sql("""update `tabPurchase Order Item Supplied`
  			set reserve_warehouse = %s
  			where parent = %s and rm_item_code = %s
  		""", (reserve_warehouse, item["poname"], item["rm_item_code"]))
  
  	# Update bin
  	item_wh_bin = frappe.db.sql(("""
  		select distinct poitemsup.rm_item_code as rm_item_code, 
  			poitemsup.reserve_warehouse as reserve_warehouse
  		from `tabPurchase Order` po, `tabPurchase Order Item Supplied` poitemsup
  		where po.name = poitemsup.parent
  			and po.is_subcontracted = "Yes"
  			and po.docstatus = 1"""), as_dict=1)
  	for d in item_wh_bin:
  		stock_bin = get_bin(d["rm_item_code"], d["reserve_warehouse"])
  		stock_bin.update_reserved_qty_for_sub_contracting()
  
  def get_warehouse(item_code, company, company_warehouse, item_wh):
  	reserve_warehouse = item_wh.get(item_code)
  	if frappe.db.get_value("Warehouse", reserve_warehouse, "company") != company:
  		reserve_warehouse = None
  	if not reserve_warehouse:
  		reserve_warehouse = company_warehouse.get(company)
  	return reserve_warehouse
subject: patch fixed