Update app.py

app.py

@@ -247,6 +247,7 @@ def build_qa_chain(collection_name, vector_db, file: str, llm_option, temperatur
     # vincent fix InvalidCollectionException 20250212
     #collection_name = create_collection_name(list_file_path[0])
     collection_name = "pdf_docs_l_"+file.name[-10:]
+    collection_name = collection_name.replace("/","_" )
     
     vector_db = Chroma.from_documents(
             documents=chunked_documents,