Dashboard missing after re-relating

[sed-i]

Bug Description

Via @vernhart.

After re-relating prometheus-openstack-exporter (src) to cos-proxy, the hypervisor dashboard didn't re-appear in grafana.

To Reproduce

Re-relate prometheus-openstack-exporter to cos proxy and inspect dashboard list in grafana UI.

Environment

cos-proxy                              n/a              active       1  cos-proxy                      latest/stable  117  no

prometheus-libvirt-exporter:dashboards                               cos-proxy:dashboards                                          grafana-dashboard               regular      
prometheus-libvirt-exporter:nrpe-external-master                     nrpe:nrpe-external-master                                     nrpe-external-master            subordinate  
prometheus-libvirt-exporter:scrape                                   cos-proxy:prometheus-target                                   http                            regular      
prometheus-openstack-exporter:dashboards                             cos-proxy:dashboards                                          grafana-dashboard               regular      
prometheus-openstack-exporter:juju-info                              grafana-agent-container:juju-info                             juju-info                       subordinate  
prometheus-openstack-exporter:juju-info                              landscape-client:container                                    juju-info                       subordinate  
prometheus-openstack-exporter:juju-info                              logrotated:juju-info                                          juju-info                       subordinate  
prometheus-openstack-exporter:juju-info                              nrpe:general-info                                             juju-info                       subordinate  
prometheus-openstack-exporter:juju-info                              ubuntu-advantage:juju-info                                    juju-info                       subordinate  
prometheus-openstack-exporter:nrpe-external-master                   nrpe:nrpe-external-master                                     nrpe-external-master            subordinate  
prometheus-openstack-exporter:prometheus-openstack-exporter-service  cos-proxy:prometheus-target                                   http                            regular      

(Full status).

Relevant log output

NTA.

Additional context

• Not sure, but perhaps related to dashboard UID collision.
• Maybe related to https://github.com/canonical/grafana-k8s-operator/issues/346.