How can I handle my messages with RabbitMQ and Symfony Messenger

I have 3 Symfony projets. All are using the same user entity but have 3 different databases (1 per project).
I want to replicate data when one of the project is editing / creating / deleting a user.

So I have a message broker (RabbitMQ).

The desired behavior I want to have is this:

• When project 1 is sending a message, project 2 and 3 reads it, but 1 not
• When project 2 is sending a message, project 1 and 3 reads it, but 2 not
• When project 3 is sending a message, project 1 and 2 reads it, but 3 not

But actually, when I’m sending a message (from 1 or 2 or 3), the project itself also reads the message…

This is my configuration:

framework:
    messenger:
        # Uncomment this (and the failed transport below) to send failed messages to this transport for later handling.
        # failure_transport: failed
        serializer:
            default_serializer: messenger.transport.symfony_serializer
            symfony_serializer:
                format: json
                context: { }

        transports:
            sso:
                dsn: '%env(TRANSPORT)%/sso'
                serializer: messenger.transport.symfony_serializer
                options:
                    exchange:
                        name: my_fanout
                    queues:
                        queue1: ~

        routing:
            # Route your messages to the transports
             'AcmeCoreBundleMessageCreatedCreatedUserNotification': sso

What I missed? Does anyone have an idea?