aws - How to add multiple postgresql connectors to EMR via configuration file

Question

To add one postgresql connector to presto in AWS EMR, can be achieved with the config file below.

[
    {
        "Classification": "presto-connector-postgresql",
        "Properties": {
            "connection-url": "jdbc:postgresql://<host>:<port>/<database>",
            "connection-user": "<user>",
            "connection-password": "<password>"
        },
        "Configurations": []
    }
]

However, when I attempted to simply add an item to the config file, like so:

[
    {
        "Classification": "presto-connector-postgresql",
        "Properties": {
            "connection-url": "jdbc:postgresql://<host>:<port>/<database>",
            "connection-user": "<user>",
            "connection-password": "<password>"
        },
        "Configurations": []
    },
    {
        "Classification": "presto-connector-postgresql",
        "Properties": {
            "connection-url": "jdbc:postgresql://<host>:<port>/<another-database>",
            "connection-user": "<user>",
            "connection-password": "<password>"
        },
        "Configurations": []
    }

]

Terraform complains: Classification 'presto-connector-postgresql' was specified multiple times.

This can be achieved by manually adding each database in a database.properties file under /etc/presto/conf/catalog folder.

database.properties

connector.name=postgresql
connection-password = <password>
connection-url = jdbc:postgresql://<host>:<port>/<database>
connection-user = <user>

another-database.properties

connector.name=postgresql
connection-password = <password>
connection-url = jdbc:postgresql://<host>:<port>/<another-database>
connection-user = <user>

Just wondering if there is a way to achieve the same goal via the EMR configuration.