some quick notes:
- in a distributed setup (with config push), first update all slaves, then the master
- after upgrading, check the list of “unacknowledged incompatible werks” in the release notes (red numbered button besides the version number on the top of the sidebar)
- agents can be older but should not be newer than the monitoring server. you might miss some features when using an older agent though, so upgrading agents afterwards is highly recomended.
- always have a working backup
