I am trying to create an SA360 data transfer into BigQuery using the UI.

In the Custom Columns field I am using the following configuration.

[
    {
        "id": "123456789",
        "destination_table_name": [
            "Conversion", 
            "AdGroupConversionActionAndDeviceStats", 
            "CampaignConversionActionAndDeviceStats" 
        ],
        "bigquery_column_name": "my_custom_col_name"
    }
]

I recieve the error code 3: Custom column with id '123456789' does not exist.

Does anyone know what could be causing this issue?