Removing Prometheus Metric not working

[b0nes]

I've read everything, tried everything, and I need a sanity check.

In the Prometheus UI, these metrics simply won't disappear:

They have "no data" when I click on them, but when I use:

curl -XPOST -g 'http://localhost:9090/api/v1/admin/tsdb/delete_series?match[]={__name__=~".*http_duration.*"}' -v

curl -XPOST http://localhost:9090/api/v1/admin/tsdb/clean_tombstones -v

They still appear.

These metrics were originally gathered from statsd_exporter, but it hasn't been running for a while now.

This seems like a bug to me.

Any ideas?