diff --git a/documentation/prometheus-mixin/alerts.libsonnet b/documentation/prometheus-mixin/alerts.libsonnet
index e07616ef7..d37b12b43 100644
--- a/documentation/prometheus-mixin/alerts.libsonnet
+++ b/documentation/prometheus-mixin/alerts.libsonnet
@@ -185,7 +185,7 @@
               # https://www.robustperception.io/alerting-on-gauges-in-prometheus-2-0 for details.
               (
                 max_over_time(prometheus_remote_storage_highest_timestamp_in_seconds{%(prometheusSelector)s}[5m])
-              - on(job, instance) group_right
+              - ignoring(remote_name, url) group_right
                 max_over_time(prometheus_remote_storage_queue_highest_sent_timestamp_seconds{%(prometheusSelector)s}[5m])
               )
               > 120