diff --git a/api/core/model_runtime/entities/message_entities.py b/api/core/model_runtime/entities/message_entities.py
index 2ffc714a49..fa74f35d28 100644
--- a/api/core/model_runtime/entities/message_entities.py
+++ b/api/core/model_runtime/entities/message_entities.py
@@ -252,7 +252,6 @@ class AssistantPromptMessage(PromptMessage):
         return super().is_empty() and not self.tool_calls
 
 
-
 class SystemPromptMessage(PromptMessage):
     """
     Model class for system prompt message.