update the chat state version with messages

surfsense_backend/app/routes/chats_routes.py

@@ -259,9 +259,10 @@ async def update_chat(
         db_chat = await read_chat(chat_id, session, user)
         update_data = chat_update.model_dump(exclude_unset=True)
         for key, value in update_data.items():
+            if key == "messages":
+                db_chat.state_version = len(update_data["messages"])
             setattr(db_chat, key, value)
-        # Increment state_version when chat is modified
+
-        db_chat.state_version = (db_chat.state_version or 0) + 1
         await session.commit()
         await session.refresh(db_chat)
         return db_chat

surfsense_backend/app/tasks/podcast_tasks.py

@@ -139,6 +139,22 @@ async def generate_chat_podcast(
             },
         )
 
+        # check if podcast already exists for this chat with the same title (re-generation)
+        existing_podcast = await session.execute(
+            select(Podcast).filter(
+                Podcast.chat_id == chat_id, Podcast.title == podcast_title
+            )
+        )
+        existing_podcast = existing_podcast.scalars().first()
+
+        if existing_podcast:
+            existing_podcast.podcast_transcript = serializable_transcript
+            existing_podcast.file_location = result["final_podcast_file_path"]
+            existing_podcast.chat_state_version = chat.state_version
+            await session.commit()
+            await session.refresh(existing_podcast)
+            return existing_podcast
+        else:
             podcast = Podcast(
                 title=f"{podcast_title}",
                 podcast_transcript=serializable_transcript,