fix: check if customer provided item while setting opening stock
diff --git a/erpnext/stock/doctype/item/item.py b/erpnext/stock/doctype/item/item.py
index b661570..7b7d2da 100644
--- a/erpnext/stock/doctype/item/item.py
+++ b/erpnext/stock/doctype/item/item.py
@@ -177,7 +177,7 @@
 		if not self.valuation_rate and self.standard_rate:
 			self.valuation_rate = self.standard_rate
 
-		if not self.valuation_rate:
+		if not self.valuation_rate and not self.is_customer_provided_item:
 			frappe.throw(_("Valuation Rate is mandatory if Opening Stock entered"))
 
 		from erpnext.stock.doctype.stock_entry.stock_entry_utils import make_stock_entry