hi there, how do I concate two vectorstore index? I want load a new file as vectorstore and add it to previous indexed file. Thank you.

When use the index.as_query_engine.query("questions"), How do I trace the node that made llm to make the response? I would like it not only answer the question by also give its source.

anyone know where does this error come from?

Hello, anyone know how to print out intermediate steps and times ? Trace: query |_query -> 6.765974 seconds |_retrieve -> 0.404373 seconds |_embedding -> 0.394931 seconds |_synthesize -> 6.361441 seconds |_llm -> 6.334911 seconds

like this one