External service added through UI scraping at interval of 1s. How to increase to 15s?

We have some nodes exposing metrics through the prometheus client library. We added them to pmm as External Services. The issue we are facing is that these metrics are getting scraped at an interval of 1s. We want to increase it to 15s but cannot find a way to do it.

The data source shows scrape interval as 1s but says it’s a provisioned data source and to contact admin to change it. We’re running pmm in docker and I checked victoriametrics-promscrape.yml and it the global is 15s and I did not find anything which says 1s.

I can provide any additional details required. Thanks!