MongoDb ReplaceOne remove and insert new record or update?

Question

I have 2 services. Both are connected to the same mongodb.

Both use ReplaceOne method, and from time of time I get errors about duplicate key.

I think if ReplaceOne removes record and insert new - it explain my problem...

So... does method ReplaceOne remove record and insert new or update old record?

Answer 1

It seems to me that perhaps your services are removing and inserting the new document at the same time when they are accessed simultaneously and generating with the same id.

I hope I have helped.