diff --git a/erpnext/buying/utils.py b/erpnext/buying/utils.py
index 54f00417a89..885a251f1f8 100644
--- a/erpnext/buying/utils.py
+++ b/erpnext/buying/utils.py
@@ -43,7 +43,9 @@ def update_last_purchase_rate(doc, is_submit) -> None:
 				frappe.throw(_("UOM Conversion factor is required in row {0}").format(d.idx))
 
 		# update last purchsae rate
-		frappe.db.set_value("Item", d.item_code, "last_purchase_rate", flt(last_purchase_rate))
+		frappe.db.set_value(
+			"Item", d.item_code, "last_purchase_rate", flt(last_purchase_rate), update_modified=False
+		)
 
 
 def validate_for_items(doc) -> None:
diff --git a/erpnext/stock/doctype/item/item.py b/erpnext/stock/doctype/item/item.py
index cdeedae35bd..747ec8e2d8b 100644
--- a/erpnext/stock/doctype/item/item.py
+++ b/erpnext/stock/doctype/item/item.py
@@ -689,7 +689,7 @@ class Item(Document):
 
 	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)
+		frappe.db.set_value("Item", new_name, "last_purchase_rate", last_purchase_rate, update_modified=False)
 
 	def recalculate_bin_qty(self, new_name):
 		from erpnext.stock.stock_balance import repost_stock