diff --git a/esua-epdc/epdc-module/epdc-group/epdc-group-server/src/main/resources/mapper/topic/GroupTopicUserReadDao.xml b/esua-epdc/epdc-module/epdc-group/epdc-group-server/src/main/resources/mapper/topic/GroupTopicUserReadDao.xml
index e3d98a954..b96ee55e0 100644
--- a/esua-epdc/epdc-module/epdc-group/epdc-group-server/src/main/resources/mapper/topic/GroupTopicUserReadDao.xml
+++ b/esua-epdc/epdc-module/epdc-group/epdc-group-server/src/main/resources/mapper/topic/GroupTopicUserReadDao.xml
@@ -4,7 +4,7 @@
 <mapper namespace="com.elink.esua.epdc.modules.topic.dao.GroupTopicUserReadDao">
 
     <update id="updateTopicReadFlag">
-        UPDATE epdc_group_topic_user_read SET READ_FLAG = #{readFlag} WHERE GROUP_ID = #{groupId} AND USER_ID = #{userId}
+        UPDATE epdc_group_topic_user_read SET READ_FLAG = #{readFlag} WHERE READ_FLAG = '0' AND GROUP_ID = #{groupId} AND USER_ID = #{userId}
     </update>
 
 </mapper>
\ No newline at end of file