Grafana 8.x is not supported

[rverchere]

When doing a yum update, grafana is updated to the latest version.
As of today, only < 7.x is supported

[rverchere]

# yum downgrade grafana-7.5.8-1
# systemctl restart grafana-server

To lock package :

# yum install yum-plugin-versionlock
# yum versionlock grafana