retryWrites can not be set to false in transaction

Hey guys,
I have ran into an issue using the mongodb rust crate, I want to create a session, start a transaction and commit it, however when I do it I get the following panic:

Error { kind: Command(CommandError { code: 20, code_name: "IllegalOperation", message: "This MongoDB deployment does not support retryable writes. Please add retryWrites=false to your connection string.", topology_version: None }), labels: {}, wire_version: Some(17), source: None }

In order to execute the transaction I use the following code structure:

let mut session = client.start_session(None).await.unwrap();

// perform a series of operations using the session

which seems to be what official crate docs tell me to do ClientSession in mongodb::sync - Rust

For the database deployment I am using just the latest mongo docker image

Could anyone point me in the right direction to solve this issue?

Thank you,