Update app.py

app.py

@@ -145,7 +145,7 @@ def unpack_zip_file(filename:str,db:LangChainFAISS,progress):
 
         if 'index.faiss' in [item.lower() for item in contents]:
             db2 = LangChainFAISS.load_local(tmp_directory, embeddings, allow_dangerous_deserialization=True)
-            db2.merge_from(db)
+            #db2.merge_from(db)
             return db2
         
         for file in contents:
@@ -298,7 +298,7 @@ def ask_llm_stream(system, user_input):
 
     stream = client.chat.completions.create(
         messages=messages,
-        model="mixtral-8x7b-32768",
+        model="llama3-70b-8192",#"mixtral-8x7b-32768",
         temperature=0.5,
         max_tokens=1024,
         top_p=1,