diff --git a/erpnext/__init__.py b/erpnext/__init__.py
index ee72dfd..416aaf4 100644
--- a/erpnext/__init__.py
+++ b/erpnext/__init__.py
@@ -5,7 +5,7 @@
 from erpnext.hooks import regional_overrides
 from frappe.utils import getdate
 
-__version__ = '10.1.12'
+__version__ = '10.1.13'
 
 def get_default_company(user=None):
 	'''Get default company for user'''
diff --git a/erpnext/accounts/report/sales_register/sales_register.py b/erpnext/accounts/report/sales_register/sales_register.py
index 4debbd6..757b760 100644
--- a/erpnext/accounts/report/sales_register/sales_register.py
+++ b/erpnext/accounts/report/sales_register/sales_register.py
@@ -25,8 +25,6 @@
 	#Cost Center & Warehouse Map
 	invoice_cc_wh_map = get_invoice_cc_wh_map(invoice_list)
 	invoice_so_dn_map = get_invoice_so_dn_map(invoice_list)
-	customers = list(set([inv.customer for inv in invoice_list]))
-	customer_map = get_customer_details(customers)
 	company_currency = frappe.db.get_value("Company", filters.get("company"), "default_currency")
 	mode_of_payments = get_mode_of_payments([inv.name for inv in invoice_list])
 
@@ -38,7 +36,6 @@
 		cost_center = list(set(invoice_cc_wh_map.get(inv.name, {}).get("cost_center", [])))
 		warehouse = list(set(invoice_cc_wh_map.get(inv.name, {}).get("warehouse", [])))
 
-		customer_details = customer_map.get(inv.customer, {})
 		row = [
 			inv.name, inv.posting_date, inv.customer, inv.customer_name
 		]
@@ -48,8 +45,8 @@
 				row.append(inv.get(col))
 
 		row +=[
-			customer_details.get("customer_group"),
-			customer_details.get("territory"),
+			inv.get("customer_group"),
+			inv.get("territory"),
 			inv.debit_to, ", ".join(mode_of_payments.get(inv.name, [])),
 			inv.project, inv.owner, inv.remarks,
 			", ".join(sales_order), ", ".join(delivery_note),", ".join(cost_center),
@@ -162,7 +159,9 @@
 		additional_query_columns = ', ' + ', '.join(additional_query_columns)
 
 	conditions = get_conditions(filters)
-	return frappe.db.sql("""select name, posting_date, debit_to, project, customer, customer_name, owner, remarks,
+	return frappe.db.sql("""
+		select name, posting_date, debit_to, project, customer, 
+		customer_name, owner, remarks, territory, customer_group,
 		base_net_total, base_grand_total, base_rounded_total, outstanding_amount {0}
 		from `tabSales Invoice`
 		where docstatus = 1 %s order by posting_date desc, name desc""".format(additional_query_columns or '') %
@@ -241,15 +240,6 @@
 
 	return invoice_cc_wh_map
 
-def get_customer_details(customers):
-	customer_map = {}
-	for cust in frappe.db.sql("""select name, territory, customer_group from `tabCustomer`
-		where name in (%s)""" % ", ".join(["%s"]*len(customers)), tuple(customers), as_dict=1):
-			customer_map.setdefault(cust.name, cust)
-
-	return customer_map
-
-
 def get_mode_of_payments(invoice_list):
 	mode_of_payments = {}
 	if invoice_list:
diff --git a/erpnext/controllers/selling_controller.py b/erpnext/controllers/selling_controller.py
index ad32ab5..606cc90 100644
--- a/erpnext/controllers/selling_controller.py
+++ b/erpnext/controllers/selling_controller.py
@@ -332,7 +332,7 @@
 	def set_po_nos(self):
 		if self.doctype in ("Delivery Note", "Sales Invoice"):
 			ref_fieldname = "against_sales_order" if self.doctype == "Delivery Note" else "sales_order"
-			sales_orders = list(set([d.get(ref_fieldname) for d in self.items]))
+			sales_orders = list(set([d.get(ref_fieldname) for d in self.items if d.get(ref_fieldname)]))
 			if sales_orders:
 				po_nos = frappe.get_all('Sales Order', 'po_no', filters = {'name': ('in', sales_orders)})
 				self.po_no = ', '.join(list(set([d.po_no for d in po_nos if d.po_no])))