fix: #793 【合包客户】11.合并客户，客户经理均为空，允许合并

yudao-module-customer/yudao-module-customer-rest/src/main/java/cn/iocoder/yudao/module/customer/controller/admin/customer/CustomerController.java

@@ -379,17 +379,11 @@ public class CustomerController {
         if (customerDOSaved == null) {
             throw exception(ErrorCodeConstants.CUSTOMER_SAVED_NOT_EXISTS);
         }
-        if (customerDOSaved.getCustomerService() == null) {
-            throw exception(ErrorCodeConstants.CUSTOMER_SAVED_CUSTOMER_SERVICE_IS_NULL);
-        }
         CustomerDO customerDODeleted = customerService.getById(par.getCustomerIdDeleted());
         if (customerDODeleted == null) {
             throw exception(ErrorCodeConstants.CUSTOMER_DELETED_NOT_EXISTS);
         }
-        if (customerDODeleted.getCustomerService() == null) {
-            throw exception(ErrorCodeConstants.CUSTOMER_DELETED_CUSTOMER_SERVICE_IS_NULL);
-        }
-        if (!customerDOSaved.getCustomerService().equals(customerDODeleted.getCustomerService())) {
+        if (!Objects.equals(customerDOSaved.getCustomerService(), customerDODeleted.getCustomerService())) {
             throw exception(ErrorCodeConstants.CUSTOMER_MERGE_CUSTOMER_SERVICE_NOT_SAME);
         }