Update app.py

app.py

@@ -56,7 +56,10 @@ qa_chain = init_rag_chain()
 # ------------- PDF Ingestion -------------
 def ingest_pdf(file_bytes: bytes, file_name: str):
     embedding = HuggingFaceEmbeddings(model_name="all-MiniLM-L6-v2")
-    vectordb = Chroma(persist_directory="./rag_db", embedding_function=embedding)
+    vectordb = Chroma(
+        persist_directory=f"./rag_db/{st.session_state.session_id}",  # ✅ Fix here
+        embedding_function=embedding
+    )
     with tempfile.NamedTemporaryFile(delete=False, suffix=".pdf") as tmp:
         tmp.write(file_bytes)
         tmp_path = tmp.name