v1 API - Retrieving "unsubscribe" metric results in 404 error

Hello,

we are an ETL tool and our application so far, has been retrieving data from various endpoints of the v1 API. However, on 1st April the the imports requesting from the endpoints

'https://a.klaviyo.com/api/v1/metrics'

and  'https://a.klaviyo.com/api/v1/metric/'

have started to fail for the metric “unsubscribe” / “Unsubscribed. The response is a 404 error.

As far we can read from docs, the v1 API will only be deprecated by June 30, 2024. Hence, we don’t have any idea why this endpoint is resulting in a 404 error for all our customers?

Thank you!