diff --git a/apps/application/serializers/chat_message_serializers.py b/apps/application/serializers/chat_message_serializers.py
index 9a38b92..7d8c629 100644
--- a/apps/application/serializers/chat_message_serializers.py
+++ b/apps/application/serializers/chat_message_serializers.py
@@ -122,6 +122,7 @@ class ChatMessageSerializer(serializers.Serializer):
                 vector.delete_by_paragraph_id(_value.get('paragraph_id'))
 
         title, content = (None, None) if paragraph is None else (paragraph.title, paragraph.content)
+        _id = str(uuid.uuid1())
 
         embedding_id, dataset_id, document_id, paragraph_id, source_type, source_id = (_value.get(
             'id'), _value.get(
@@ -130,6 +131,26 @@ class ChatMessageSerializer(serializers.Serializer):
             'paragraph_id'), _value.get(
             'source_type'), _value.get(
             'source_id')) if _value is not None else (None, None, None, None, None, None)
+
+        if chat_model is None:
+            def event_block_content(c: str):
+                yield 'data: ' + json.dumps({'chat_id': chat_id, 'id': _id, 'operate': paragraph is not None,
+                                             'content': c if c is not None else '抱歉，根据已知信息无法回答这个问题，请重新描述您的问题或提供更多信息～'}) + "\n\n"
+                chat_info.append_chat_message(
+                    ChatMessage(_id, message, title, content, embedding_id, dataset_id, document_id,
+                                paragraph_id,
+                                source_type,
+                                source_id, c, 0,
+                                0))
+                # 重新设置缓存
+                chat_cache.set(chat_id,
+                               chat_info, timeout=60 * 30)
+
+            r = StreamingHttpResponse(streaming_content=event_block_content(content),
+                                      content_type='text/event-stream;charset=utf-8')
+
+            r['Cache-Control'] = 'no-cache'
+            return r
         # 获取上下文
         history_message = chat_info.get_context_message()
 
@@ -138,8 +159,6 @@ class ChatMessageSerializer(serializers.Serializer):
         # 对话
         result_data = chat_model.stream(chat_message)
 
-        _id = str(uuid.uuid1())
-
         def event_content(response):
             all_text = ''
             try:
diff --git a/apps/application/serializers/chat_serializers.py b/apps/application/serializers/chat_serializers.py
index 7fd260a..43d53fe 100644
--- a/apps/application/serializers/chat_serializers.py
+++ b/apps/application/serializers/chat_serializers.py
@@ -93,14 +93,16 @@ class ChatSerializers(serializers.Serializer):
             self.is_valid(raise_exception=True)
             application_id = self.data.get('application_id')
             application = QuerySet(Application).get(id=application_id)
-            model = application.model
+            model = QuerySet(Model).filter(id=application.model_id).first()
             dataset_id_list = [str(row.dataset_id) for row in
                                QuerySet(ApplicationDatasetMapping).filter(
                                    application_id=application_id)]
-            chat_model = ModelProvideConstants[model.provider].value.get_model(model.model_type, model.model_name,
-                                                                               json.loads(
-                                                                                   decrypt(model.credential)),
-                                                                               streaming=True)
+            chat_model = None
+            if model is not None:
+                chat_model = ModelProvideConstants[model.provider].value.get_model(model.model_type, model.model_name,
+                                                                                   json.loads(
+                                                                                       decrypt(model.credential)),
+                                                                                   streaming=True)
 
             chat_id = str(uuid.uuid1())
             chat_cache.set(chat_id,
diff --git a/pyproject.toml b/pyproject.toml
index 5447e83..7107e0f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -19,7 +19,6 @@ diskcache = "^5.6.3"
 pillow = "9.5.0"
 filetype = "^1.2.0"
 chardet = "^5.2.0"
-torch = "^2.1.0"
 sentence-transformers = "^2.2.2"
 blinker = "^1.6.3"
 openai = "^0.28.1"