API - Metrics Aggregate endpoint: I can't make a request to get metrics aggregated by $attributed_message or Campaign Name

Hi,

I’ve been using following request for a while and suddenly it started to fail or phrased differently I get this “A server error occured. I’ve tested multiple combinations but it seems like the aggregation “by” “$attributed_message” , "Campaign Name" does not seem to work anymore. What I noticed however, aggregating “by” “Email Domain” works and I get results with summed metrics by “Email Domain”. 

Here is an example of my request body. 

{
	"data": {
		"type": "metric-aggregate",
		"attributes": {
			"metric_id": "TRVfSb",
			"measurements": [
				"sum_value"
			],
			"filter": [
                "greater-or-equal(datetime,2024-12-01T00:00:00)",
                "less-than(datetime,2024-12-01T23:59:59)"
			],
            "by": [
                "$attributed_message"
            ],
			"interval": "day",
			"page_size": 500,
			"timezone": "UTC",
            "sort": "$attributed_message"
		}
	}
}

This is what I get:

{
    "errors": [
        {
            "id": "2d5ceef8-faec-494e-a669-def7c6d797b0",
            "status": 500,
            "code": "error",
            "title": "A server error occurred.",
            "detail": "internal",
            "source": {
                "pointer": "/data"
            },
            "links": {},
            "meta": {
                "status": "INTERNAL",
                "code": 13
            }
        }
    ]
}

When I aggregate by “Campaign Name”, no dimension is shown. 
 

{
    "data": {
        "type": "metric-aggregate",
        "id": "-1113528091502332327",
        "attributes": {
            "dates": [
                "2024-12-01T00:00:00+00:00"
            ],
            "data": [
                {
                    "dimensions": [
                        ""
                    ],
                    "measurements": {
                        "sum_value": [
                            0.0
                        ]
                    }
                }
            ]
        },
        "links": {
            "self": "https://a.klaviyo.com/api/metric-aggregates/"
        }
    },
    "links": {
        "self": "https://a.klaviyo.com/api/metric-aggregates",
        "next": null,
        "prev": null
    }
}

Note: It has worked before until some weeks ago.