diff --git a/erpnext/accounts/report/financial_statements.py b/erpnext/accounts/report/financial_statements.py
index e66d20e..bc4a220 100644
--- a/erpnext/accounts/report/financial_statements.py
+++ b/erpnext/accounts/report/financial_statements.py
@@ -42,9 +42,6 @@
 		if to_date == get_first_day(to_date):
 			# if to_date is the first day, get the last day of previous month
 			to_date = add_days(to_date, -1)
-		else:
-			# to_date should be the last day of the new to_date's month
-			to_date = get_last_day(to_date)
 
 		if to_date <= year_end_date:
 			# the normal case
diff --git a/erpnext/accounts/report/purchase_register/purchase_register.py b/erpnext/accounts/report/purchase_register/purchase_register.py
index 4bba066..47f79f1 100644
--- a/erpnext/accounts/report/purchase_register/purchase_register.py
+++ b/erpnext/accounts/report/purchase_register/purchase_register.py
@@ -185,7 +185,7 @@
 			pr_list = [d.purchase_receipt]
 		elif d.po_detail:
 			pr_list = frappe.db.sql_list("""select distinct parent from `tabPurchase Receipt Item`
-				where docstatus=1 and prevdoc_detail_docname=%s""", d.po_detail)
+				where docstatus=1 and purchase_order_item=%s""", d.po_detail)
 
 		if pr_list:
 			invoice_po_pr_map.setdefault(d.parent, frappe._dict()).setdefault("purchase_receipt", pr_list)
diff --git a/erpnext/buying/doctype/quality_inspection/quality_inspection.py b/erpnext/buying/doctype/quality_inspection/quality_inspection.py
index d1d9518..8d85715 100644
--- a/erpnext/buying/doctype/quality_inspection/quality_inspection.py
+++ b/erpnext/buying/doctype/quality_inspection/quality_inspection.py
@@ -28,15 +28,12 @@
 			frappe.db.sql("""update `tabPurchase Receipt Item` t1, `tabPurchase Receipt` t2
 				set t1.qa_no = %s, t2.modified = %s
 				where t1.parent = %s and t1.item_code = %s and t1.parent = t2.name""",
-				(self.name, self.modified, self.purchase_receipt_no,
-					self.item_code))
+				(self.name, self.modified, self.purchase_receipt_no, self.item_code))
 
 	def on_cancel(self):
 		if self.purchase_receipt_no:
-			frappe.db.sql("""update `tabPurchase Receipt Item` t1, `tabPurchase Receipt` t2
-				set t1.qa_no = '', t2.modified = %s
-				where t1.parent = %s and t1.item_code = %s and t1.parent = t2.name""",
-				(self.modified, self.purchase_receipt_no, self.item_code))
+			frappe.db.sql("""update `tabPurchase Receipt Item` set qa_no = '', modified=%s 
+				where qa_no = %s""", (self.modified, self.name))
 
 def item_query(doctype, txt, searchfield, start, page_len, filters):
 	if filters.get("from"):
diff --git a/erpnext/patches/v6_16/update_billing_status_in_dn_and_pr.py b/erpnext/patches/v6_16/update_billing_status_in_dn_and_pr.py
index b660d39..481f130 100644
--- a/erpnext/patches/v6_16/update_billing_status_in_dn_and_pr.py
+++ b/erpnext/patches/v6_16/update_billing_status_in_dn_and_pr.py
@@ -22,7 +22,7 @@
 
 	# Update billed_amt in DN and PR which are not against any order
 	for d in frappe.db.sql("""select name from `tabPurchase Receipt Item` item
-		where (prevdoc_detail_docname is null or prevdoc_detail_docname = '') and docstatus=1""", as_dict=1):
+		where (purchase_order_item is null or purchase_order_item = '') and docstatus=1""", as_dict=1):
 
 		billed_amt = frappe.db.sql("""select sum(amount) from `tabPurchase Invoice Item`
 			where pr_detail=%s and docstatus=1""", d.name)