How to remove several [vector, text] on existing vectorstore

[fajarmuslim]

I already tried to build question and answer system using the RetrievalQA with following steps

• generate embedding from text using vector store with FAISS.from_documents(docs, llm) functionality
• use RetrievalQA and the to answer the question

I want to update the knowledge. So, my intention is to remove the old [vector, text] first and then add new [vector, text] on the vectorstore.

I already found the reference to add knowledge by running the merge method -> https://python.langchain.com/docs/integrations/vectorstores/faiss

and didn't found yet the reference for updating the existing knowledge...

Is it possible to remove several [vector, text] on FAISS during the Q&A system running? or update directly the [vector, text] on vector store?

[fajarmuslim]

I found an answer here:

• how to save, load and update vectorstoreindex locally? #4188
• How to delete or update a document within a FAISS index? #2699