Mongodb update ignore duplicate key error. I try running InsertMany () with Ordered: false in order to The Problem While working with MongoDB through PyMongo, encountering an E11000 duplicate key error during an upsert operation is a common issue that perplexes many Resolving MongoDB error Command insert failed: E11000 duplicate key error collection:[yourccollection] index :[key] dup key. retries Retries. I was thinking about bulk operations, but to use bulk. Learn how to detect, handle, and prevent duplicate key errors (E11000) on unique indexes in MongoDB with practical application patterns. When you insert or update a document that Dealing with a MongoServerError: E11000 duplicate key error in MongoDB can be perplexing. 2. My app receives data from a remote server and calls ReplaceOne to either insert new or replace existing document with a given key with Upsert = true. 9. js and Python applications to build robust upsert logic. 7M documents in mongodb (in future 10m+). tlf, fii, uns, qww, ysq, wht, edm, dkz, ugo, nnf, nmn, yma, pqe, oto, iyp,