diff --git a/Yi.Abp.Net8/module/ai-hub/Yi.Framework.AiHub.Domain/Entities/Chat/MessageAggregateRoot.cs b/Yi.Abp.Net8/module/ai-hub/Yi.Framework.AiHub.Domain/Entities/Chat/MessageAggregateRoot.cs
index fe967daa..bb1b97f7 100644
--- a/Yi.Abp.Net8/module/ai-hub/Yi.Framework.AiHub.Domain/Entities/Chat/MessageAggregateRoot.cs
+++ b/Yi.Abp.Net8/module/ai-hub/Yi.Framework.AiHub.Domain/Entities/Chat/MessageAggregateRoot.cs
@@ -24,7 +24,8 @@ public class MessageAggregateRoot : FullAuditedAggregateRoot<Guid>
     {
         UserId = userId;
         SessionId = sessionId;
-        Content = content;
+        //如果没有会话，不存储对话内容
+        Content = sessionId is null ? null : content;
         Role = role;
         ModelId = modelId;
         if (tokenUsage is not null)