diff --git a/apps/application/flow/i_step_node.py b/apps/application/flow/i_step_node.py
index ddba247373a..ea3649432de 100644
--- a/apps/application/flow/i_step_node.py
+++ b/apps/application/flow/i_step_node.py
@@ -251,7 +251,7 @@ class FlowParamsSerializer(serializers.Serializer):
 
     application_id = serializers.CharField(required=True, label="应用id")
 
-    re_chat = serializers.BooleanField(required=True, label="换个答案")
+    re_chat = serializers.BooleanField(required=False, default=False, label="换个答案")
 
     debug = serializers.BooleanField(required=True, label="是否debug")
 
diff --git a/apps/chat/serializers/chat.py b/apps/chat/serializers/chat.py
index 4514dc457bc..3f2de84cf9b 100644
--- a/apps/chat/serializers/chat.py
+++ b/apps/chat/serializers/chat.py
@@ -75,7 +75,7 @@ class ChatMessageSerializers(serializers.Serializer):
     message = serializers.CharField(required=True, label=_("User Questions"))
     stream = serializers.BooleanField(required=True,
                                       label=_("Is the answer in streaming mode"))
-    re_chat = serializers.BooleanField(required=True, label=_("Do you want to reply again"))
+    re_chat = serializers.BooleanField(required=False, default=False, label=_("Do you want to reply again"))
     chat_record_id = serializers.UUIDField(required=False, allow_null=True,
                                            label=_("Conversation record id"))
 
@@ -210,7 +210,7 @@ class OpenAIMessage(serializers.Serializer):
 class OpenAIInstanceSerializer(serializers.Serializer):
     messages = serializers.ListField(child=OpenAIMessage())
     chat_id = serializers.UUIDField(required=False, label=_("Conversation ID"))
-    re_chat = serializers.BooleanField(required=False, label=_("Regenerate"))
+    re_chat = serializers.BooleanField(required=False, default=False, label=_("Regenerate"))
     stream = serializers.BooleanField(required=False, label=_("Streaming Output"))
 
 
@@ -336,7 +336,7 @@ def is_valid_application_simple(self, *, chat_info: ChatInfo, raise_exception=Fa
 
     def chat_simple(self, chat_info: ChatInfo, instance, base_to_response):
         message = instance.get('message')
-        re_chat = instance.get('re_chat')
+        re_chat = instance.get('re_chat', False)
         stream = instance.get('stream')
         chat_user_id = self.data.get('chat_user_id')
         chat_user_type = self.data.get('chat_user_type')
@@ -391,7 +391,7 @@ def get_chat_record(chat_info, chat_record_id):
 
     def chat_work_flow(self, chat_info: ChatInfo, instance: dict, base_to_response):
         message = instance.get('message')
-        re_chat = instance.get('re_chat')
+        re_chat = instance.get('re_chat', False)
         stream = instance.get('stream')
         chat_user_id = self.data.get("chat_user_id")
         chat_user_type = self.data.get('chat_user_type')