diff --git a/mhd_oms/src/main/java/com/mhd/oms/domain/reservationStockOutOrder/service/ReservationStockOutOrderDomainService.java b/mhd_oms/src/main/java/com/mhd/oms/domain/reservationStockOutOrder/service/ReservationStockOutOrderDomainService.java
index bf7018944..1b0352ffb 100644
--- a/mhd_oms/src/main/java/com/mhd/oms/domain/reservationStockOutOrder/service/ReservationStockOutOrderDomainService.java
+++ b/mhd_oms/src/main/java/com/mhd/oms/domain/reservationStockOutOrder/service/ReservationStockOutOrderDomainService.java
@@ -1082,7 +1082,7 @@ public class ReservationStockOutOrderDomainService {
     public String generateReserveOrderNumber1() {
         SimpleDateFormat sdf = new SimpleDateFormat("yyMMdd");
         String datePart = sdf.format(new Date());
-        String prefix = "R" + datePart;
+        String prefix = "C" + datePart;
         List<String> orderNumber1 = reservationStockOutOrderMapper.generateReserveOrderNumber1(prefix);
         List<String> orderNumber2 = reserveStockOutOrderMapper.generateReserveOrderNumber1(prefix);
         List<String> allOrders = new ArrayList<>();