diff --git a/src/main/java/com/project/exam/domain/service/impl/AdminSearchExamRecordDomainServiceImpl.java b/src/main/java/com/project/exam/domain/service/impl/AdminSearchExamRecordDomainServiceImpl.java
index 6d13348..f07b98a 100644
--- a/src/main/java/com/project/exam/domain/service/impl/AdminSearchExamRecordDomainServiceImpl.java
+++ b/src/main/java/com/project/exam/domain/service/impl/AdminSearchExamRecordDomainServiceImpl.java
@@ -27,6 +27,7 @@ import org.springframework.stereotype.Service;
 
 import java.util.List;
 import java.util.Objects;
+import java.util.Optional;
 import java.util.concurrent.atomic.AtomicInteger;
 
 @Service
@@ -112,13 +113,13 @@ public class AdminSearchExamRecordDomainServiceImpl implements AdminSearchExamRe
             dto.setPassText(ExamRecordPassTextEnum.Fail.getValue());
             dto.setPassHtml(ExamRecordPassTextEnum.Fail.getHtml());
         }
-
-        TaskUserEntity taskUser = taskUserBaseService.getById(dto.getTaskUserId());
-        if (taskUser != null){
-            TaskUserDTO taskUserDTO = taskUserBaseService.getById(dto.getTaskUserId()).toDTO(TaskUserDTO::new);
-            dto.setUserName(taskUserDTO.getUserName());
+        dto.setUserName("");
+        if (Objects.nonNull(dto.getTaskUserId())) {
+            TaskUserEntity taskUserEntity = taskUserBaseService.getById(dto.getTaskUserId());
+            dto.setUserName(Optional.ofNullable(taskUserEntity).map(TaskUserEntity::getUserName).orElse(""));
         }
 
+
         return dto;
     }