diff --git a/erpnext/stock/doctype/item/item.py b/erpnext/stock/doctype/item/item.py
index a75ee67..d5f479f 100644
--- a/erpnext/stock/doctype/item/item.py
+++ b/erpnext/stock/doctype/item/item.py
@@ -13,7 +13,7 @@
 from erpnext.setup.doctype.item_group.item_group import (get_parent_item_groups, invalidate_cache_for)
 from frappe import _, msgprint
 from frappe.utils import (cint, cstr, flt, formatdate, get_timestamp, getdate,
-						  now_datetime, random_string, strip)
+						  now_datetime, random_string, strip, get_link_to_form)
 from frappe.utils.html_utils import clean_html
 from frappe.website.doctype.website_slideshow.website_slideshow import \
 	get_slideshow
@@ -634,6 +634,9 @@
 									+ ": \n" + ", ".join([self.meta.get_label(fld) for fld in field_list]))
 
 	def after_rename(self, old_name, new_name, merge):
+		if merge:
+			self.validate_duplicate_item_in_stock_reconciliation(old_name, new_name)
+
 		if self.route:
 			invalidate_cache_for_item(self)
 			clear_cache(self.route)
@@ -656,6 +659,27 @@
 					frappe.db.set_value(dt, d.name, "item_wise_tax_detail",
 											json.dumps(item_wise_tax_detail), update_modified=False)
 
+	def validate_duplicate_item_in_stock_reconciliation(self, old_name, new_name):
+		records = frappe.db.sql(""" SELECT parent, COUNT(*) as records
+			FROM `tabStock Reconciliation Item`
+			WHERE item_code = %s and docstatus = 1
+			GROUP By item_code, warehouse, parent
+			HAVING records > 1
+		""", new_name, as_dict=1)
+
+		if not records: return
+		document = _("Stock Reconciliation") if len(records) == 1 else _("Stock Reconciliations")
+
+		msg = _("The items {0} and {1} are present in the following {2} : <br>"
+			.format(frappe.bold(old_name), frappe.bold(new_name), document))
+
+		msg += ', '.join([get_link_to_form("Stock Reconciliation", d.parent) for d in records]) + "<br><br>"
+
+		msg += _("Note: To merge the items, create a separate Stock Reconciliation for the old item {0}"
+			.format(frappe.bold(old_name)))
+
+		frappe.throw(_(msg), title=_("Merge not allowed"))
+
 	def set_last_purchase_rate(self, new_name):
 		last_purchase_rate = get_last_purchase_details(new_name).get("base_net_rate", 0)
 		frappe.db.set_value("Item", new_name, "last_purchase_rate", last_purchase_rate)