diff --git a/server/crm/src/main/java/com/pudonghot/ambition/crm/service/support/CustomerYearToDateSaleServiceSupport.java b/server/crm/src/main/java/com/pudonghot/ambition/crm/service/support/CustomerYearToDateSaleServiceSupport.java
index 92c5245..94ee811 100644
--- a/server/crm/src/main/java/com/pudonghot/ambition/crm/service/support/CustomerYearToDateSaleServiceSupport.java
+++ b/server/crm/src/main/java/com/pudonghot/ambition/crm/service/support/CustomerYearToDateSaleServiceSupport.java
@@ -105,15 +105,22 @@ public class CustomerYearToDateSaleServiceSupport
                         return;
                     }
 
-                    val customer = customerMapper.find(
+                    val customers = customerMapper.list(
                         new Search(Customer.ID2, customerId2)
                                 .eq(Customer.NAME, customerName));
 
-                    if (customer == null) {
+                    if (customers.isEmpty()) {
                         log.warn("No customer [{}] found, ignore.", customerName);
                         return;
                     }
 
+                    if (customers.size() > 1) {
+                        log.warn("Duplicate customers [{}] found, error.", customers);
+                        throw new IllegalStateException(
+                            "Duplicate customer found, id [" + customerId2 + "] name [" + customerName + "]");
+                    }
+
+                    val customer = customers.iterator().next();
                     val customerId = customer.getId();
                     customerYtdSale.setCustomerId(customerId);
                     customerYtdSale.setYear(StringUtils.trim(record.get(3)));