diff --git a/erpnext/__init__.py b/erpnext/__init__.py
index 0f310836e3..16c346baa8 100644
--- a/erpnext/__init__.py
+++ b/erpnext/__init__.py
@@ -4,7 +4,7 @@ import inspect
 import frappe
 from erpnext.hooks import regional_overrides
 
-__version__ = '8.9.0'
+__version__ = '8.9.1'
 
 def get_default_company(user=None):
 	'''Get default company for user'''
diff --git a/erpnext/accounts/report/item_wise_purchase_register/item_wise_purchase_register.py b/erpnext/accounts/report/item_wise_purchase_register/item_wise_purchase_register.py
index 0e5d12857e..3171ff01bf 100644
--- a/erpnext/accounts/report/item_wise_purchase_register/item_wise_purchase_register.py
+++ b/erpnext/accounts/report/item_wise_purchase_register/item_wise_purchase_register.py
@@ -125,14 +125,15 @@ def get_purchase_receipts_against_purchase_order(item_list):
 	po_pr_map = frappe._dict()
 	po_item_rows = list(set([d.po_detail for d in item_list]))
 
-	purchase_receipts = frappe.db.sql("""
-		select parent, purchase_order_item
-		from `tabPurchase Receipt Item`
-		where docstatus=1 and purchase_order_item in (%s)
-		group by purchase_order_item, parent
-	""" % (', '.join(['%s']*len(po_item_rows))), tuple(po_item_rows), as_dict=1)
+	if po_item_rows:
+		purchase_receipts = frappe.db.sql("""
+			select parent, purchase_order_item
+			from `tabPurchase Receipt Item`
+			where docstatus=1 and purchase_order_item in (%s)
+			group by purchase_order_item, parent
+		""" % (', '.join(['%s']*len(po_item_rows))), tuple(po_item_rows), as_dict=1)
 
-	for pr in purchase_receipts:
-		po_pr_map.setdefault(pr.po_detail, []).append(pr.parent)
+		for pr in purchase_receipts:
+			po_pr_map.setdefault(pr.po_detail, []).append(pr.parent)
 
 	return po_pr_map
\ No newline at end of file
diff --git a/erpnext/accounts/report/item_wise_sales_register/item_wise_sales_register.py b/erpnext/accounts/report/item_wise_sales_register/item_wise_sales_register.py
index dfcade25ed..7009d5dc79 100644
--- a/erpnext/accounts/report/item_wise_sales_register/item_wise_sales_register.py
+++ b/erpnext/accounts/report/item_wise_sales_register/item_wise_sales_register.py
@@ -127,15 +127,16 @@ def get_delivery_notes_against_sales_order(item_list):
 	so_dn_map = frappe._dict()
 	so_item_rows = list(set([d.so_detail for d in item_list]))
 
-	delivery_notes = frappe.db.sql("""
-		select parent, so_detail
-		from `tabDelivery Note Item`
-		where docstatus=1 and so_detail in (%s)
-		group by so_detail, parent
-	""" % (', '.join(['%s']*len(so_item_rows))), tuple(so_item_rows), as_dict=1)
+	if so_item_rows:
+		delivery_notes = frappe.db.sql("""
+			select parent, so_detail
+			from `tabDelivery Note Item`
+			where docstatus=1 and so_detail in (%s)
+			group by so_detail, parent
+		""" % (', '.join(['%s']*len(so_item_rows))), tuple(so_item_rows), as_dict=1)
 
-	for dn in delivery_notes:
-		so_dn_map.setdefault(dn.so_detail, []).append(dn.parent)
+		for dn in delivery_notes:
+			so_dn_map.setdefault(dn.so_detail, []).append(dn.parent)
 
 	return so_dn_map
 
diff --git a/erpnext/regional/report/gst_itemised_purchase_register/gst_itemised_purchase_register.py b/erpnext/regional/report/gst_itemised_purchase_register/gst_itemised_purchase_register.py
index 1d94c97ed2..1a54cc3ff2 100644
--- a/erpnext/regional/report/gst_itemised_purchase_register/gst_itemised_purchase_register.py
+++ b/erpnext/regional/report/gst_itemised_purchase_register/gst_itemised_purchase_register.py
@@ -13,7 +13,8 @@ def execute(filters=None):
 		dict(fieldtype='Data', label='Invoice Type', width=120),
 		dict(fieldtype='Data', label='Export Type', width=120),
 		dict(fieldtype='Data', label='E-Commerce GSTIN', width=130),
-		dict(fieldtype='Data', label='HSN Code', width=120)
+		dict(fieldtype='Data', label='HSN Code', width=120),
+		dict(fieldtype='Data', label='Supplier Invoice No', width=120)
 	], additional_query_columns=[
 		'supplier_gstin',
 		'company_gstin',
@@ -21,5 +22,6 @@ def execute(filters=None):
 		'invoice_type',
 		'export_type',
 		'ecommerce_gstin',
-		'gst_hsn_code'
+		'gst_hsn_code',
+		'bill_no'
 	])