diff --git a/api/controllers/web/chatflow_memory.py b/api/controllers/web/chatflow_memory.py
index 5969d66bcf..276d6d3b83 100644
--- a/api/controllers/web/chatflow_memory.py
+++ b/api/controllers/web/chatflow_memory.py
@@ -20,7 +20,6 @@ class MemoryListApi(WebApiResource):
         memory_id = args.get("memory_id")
         version = args.get("version")
 
-
         if conversation_id:
             result = ChatflowMemoryService.get_persistent_memories_with_conversation(
                 app_model,
diff --git a/api/core/memory/entities.py b/api/core/memory/entities.py
index 88602142b3..3914be218d 100644
--- a/api/core/memory/entities.py
+++ b/api/core/memory/entities.py
@@ -103,7 +103,7 @@ class MemoryBlockWithConversation(MemoryBlock):
         cls,
         memory_block: MemoryBlock,
         conversation_metadata: ChatflowConversationMetadata
-    ) -> "MemoryBlockWithConversation":
+    ) -> MemoryBlockWithConversation:
         """Create MemoryBlockWithConversation from MemoryBlock"""
         return cls(
             spec=memory_block.spec,
diff --git a/api/models/chatflow_memory.py b/api/models/chatflow_memory.py
index b02b809cd7..92010aeba4 100644
--- a/api/models/chatflow_memory.py
+++ b/api/models/chatflow_memory.py
@@ -67,7 +67,7 @@ class ChatflowMessage(Base):
 
     id: Mapped[str] = mapped_column(StringUUID, primary_key=True, server_default=sa.text("uuid_generate_v4()"))
     conversation_id: Mapped[str] = mapped_column(StringUUID, nullable=False)
-    index: Mapped[int] = mapped_column(sa.Integer, nullable=False) # This index starts from 0
+    index: Mapped[int] = mapped_column(sa.Integer, nullable=False)  # This index starts from 0
     version: Mapped[int] = mapped_column(sa.Integer, nullable=False)
     data: Mapped[str] = mapped_column(sa.Text, nullable=False)  # Serialized PromptMessage JSON
     created_at: Mapped[datetime] = mapped_column(DateTime, nullable=False, server_default=func.current_timestamp())