diff --git a/src/main/java/com/ai/da/service/impl/MessageCenterServiceImpl.java b/src/main/java/com/ai/da/service/impl/MessageCenterServiceImpl.java
index 74a19386..b5e5a4f4 100644
--- a/src/main/java/com/ai/da/service/impl/MessageCenterServiceImpl.java
+++ b/src/main/java/com/ai/da/service/impl/MessageCenterServiceImpl.java
@@ -106,7 +106,11 @@ public class MessageCenterServiceImpl extends ServiceImpl<NotificationMapper, No
         IPage<NotificationVO> convert = notificationPage.convert(o -> {
             NotificationVO notificationVO = CopyUtil.copyObject(o, NotificationVO.class);
             Account senderAccount = accountService.getById(notificationVO.getSenderId());
-            notificationVO.setUserName(senderAccount.getUserName());
+            if (Objects.nonNull(senderAccount)){
+                notificationVO.setUserName(senderAccount.getUserName());
+            }else {
+                notificationVO.setUserName("--");
+            }
 //            notificationVO.setSenderUserAvatar(StringUtils.isNullOrEmpty(senderAccount.getAvatar()) ? null : minioUtil.getPreSignedUrl(senderAccount.getAvatar(), CommonConstant.MINIO_IMAGE_EXPIRE_TIME));
             if (Objects.isNull(notificationVO.getPortfolioId())){
                 notificationVO.setPortfolioId(null);