fix: stock reservation issue while making Purchase Invoice

erpnext/stock/stock_ledger.py

@@ -562,12 +562,28 @@ def __init__(
 		self.new_items_found = False
 		self.distinct_item_warehouses = args.get("distinct_item_warehouses", frappe._dict())
 		self.affected_transactions: set[tuple[str, str]] = set()
-		self.reserved_stock = flt(self.args.reserved_stock)
+		self.reserved_stock = self.get_reserved_stock()
 
 		self.data = frappe._dict()
 		self.initialize_previous_data(self.args)
 		self.build()
 
+	def get_reserved_stock(self):
+		sre = frappe.qb.DocType("Stock Reservation Entry")
+		posting_datetime = get_combine_datetime(self.args.posting_date, self.args.posting_time)
+		query = (
+			frappe.qb.from_(sre)
+			.select(Sum(sre.reserved_qty) - Sum(sre.delivered_qty))
+			.where(
+				(sre.item_code == self.item_code)
+				& (sre.warehouse == self.args.warehouse)
+				& (sre.docstatus == 1)
+				& (sre.creation <= posting_datetime)
+			)
+		).run()
+
+		return flt(query[0][0]) if query else 0.0
+
 	def set_precision(self):
 		self.flt_precision = cint(frappe.db.get_default("float_precision")) or 2
 		self.currency_precision = get_field_precision(