FAISS RuntimError

[kalinduaet]

I want to index some documents with embedding created by ColBERTV2 in FAISS. I'm using RAGatouille framework to do this. But for some documents I'm getting following error.

EXCEPTION: Error in void faiss::Clustering::train_encoded(faiss::idx_t, const uint8_t*, const faiss::Index*, faiss::Index&, const float*) at /project/faiss/faiss/Clustering.cpp:261: Error: 'nx >= k' failed: Number of training points (51) should be at least as large as number of clusters (64)
how to solve this issue. Thank you