Description of problem: level=warn ts=2020-03-06T08:49:46.084Z caller=manager.go:525 component="rule manager" group=cluster-version msg="Evaluating rule failed" rule="alert: PodDisruptionBudgetAtLimit\nexpr: kube_poddisruptionbudget_status_expected_pods == on(namespace, poddisruptionbudget,\n service) kube_poddisruptionbudget_status_desired_healthy\nfor: 15m\nlabels:\n severity: warning\nannotations:\n message: The pod disruption budget is preventing further disruption to pods because\n it is at the minimum allowed level.\n" err="found duplicate series for the match group {namespace=\"openshift-machine-config-operator\", poddisruptionbudget=\"etcd-quorum-guard\", service=\"kube-state-metrics\"} on the right hand-side of the operation: [{__name__=\"kube_poddisruptionbudget_status_desired_healthy\", endpoint=\"https-main\", instance=\"10.131.0.20:8443\", job=\"kube-state-metrics\", namespace=\"openshift-machine-config-operator\", pod=\"kube-state-metrics-7d5958fc5d-ggnq2\", poddisruptionbudget=\"etcd-quorum-guard\", service=\"kube-state-metrics\"}, {__name__=\"kube_poddisruptionbudget_status_desired_healthy\", endpoint=\"https-main\", instance=\"10.131.0.19:8443\", job=\"kube-state-metrics\", namespace=\"openshift-machine-config-operator\", pod=\"kube-state-metrics-bb6dd868-nzhzp\", poddisruptionbudget=\"etcd-quorum-guard\", service=\"kube-state-metrics\"}];many-to-many matching not allowed: matching labels must be unique on one side" level=warn ts=2020-03-06T08:49:46.084Z caller=manager.go:525 component="rule manager" group=cluster-version msg="Evaluating rule failed" rule="alert: PodDisruptionBudgetLimit\nexpr: kube_poddisruptionbudget_status_expected_pods < on(namespace, poddisruptionbudget,\n service) kube_poddisruptionbudget_status_desired_healthy\nfor: 15m\nlabels:\n severity: critical\nannotations:\n message: The pod disruption budget is below the minimum number allowed pods.\n" err="found duplicate series for the match group {namespace=\"openshift-machine-config-operator\", poddisruptionbudget=\"etcd-quorum-guard\", service=\"kube-state-metrics\"} on the right hand-side of the operation: [{__name__=\"kube_poddisruptionbudget_status_desired_healthy\", endpoint=\"https-main\", instance=\"10.131.0.20:8443\", job=\"kube-state-metrics\", namespace=\"openshift-machine-config-operator\", pod=\"kube-state-metrics-7d5958fc5d-ggnq2\", poddisruptionbudget=\"etcd-quorum-guard\", service=\"kube-state-metrics\"}, {__name__=\"kube_poddisruptionbudget_status_desired_healthy\", endpoint=\"https-main\", instance=\"10.131.0.19:8443\", job=\"kube-state-metrics\", namespace=\"openshift-machine-config-operator\", pod=\"kube-state-metrics-bb6dd868-nzhzp\", poddisruptionbudget=\"etcd-quorum-guard\", service=\"kube-state-metrics\"}];many-to-many matching not allowed: matching labels must be unique on one side" level=warn ts=2020-03-06T08:50:16.084Z caller=manager.go:525 component="rule manager" group=cluster-version msg="Evaluating rule failed" rule="alert: PodDisruptionBudgetAtLimit\nexpr: kube_poddisruptionbudget_status_expected_pods == on(namespace, poddisruptionbudget,\n service) kube_poddisruptionbudget_status_desired_healthy\nfor: 15m\nlabels:\n severity: warning\nannotations:\n message: The pod disruption budget is preventing further disruption to pods because\n it is at the minimum allowed level.\n" err="found duplicate series for the match group {namespace=\"openshift-machine-config-operator\", poddisruptionbudget=\"etcd-quorum-guard\", service=\"kube-state-metrics\"} on the right hand-side of the operation: [{__name__=\"kube_poddisruptionbudget_status_desired_healthy\", endpoint=\"https-main\", instance=\"10.131.0.20:8443\", job=\"kube-state-metrics\", namespace=\"openshift-machine-config-operator\", pod=\"kube-state-metrics-7d5958fc5d-ggnq2\", poddisruptionbudget=\"etcd-quorum-guard\", service=\"kube-state-metrics\"}, Version-Release number of selected component (if applicable): 4.3.1 Steps to Reproduce: 1. Run two kube-state-metrics pods and check logs of promethus-k8s pods or alert that is firing about rule failed.