Upgrade from a previous version of AVEVA Historian

You can upgrade directly to the current version of the Historian (2023 R2 SP1) from Historian 2017 and later versions.

You should upgrade the Historian Server before upgrading Historian remote IDAS nodes. Remote IDAS nodes that are not upgraded to 2023 R2 SP1 will remain fully functional. However, it is strongly recommended that you upgrade them to 2023 R2 SP1 to incorporate minor improvements and simplify further upgrades and maintenance.

If you have been using replication, when upgrading Historian nodes, upgrade the tier-2 Historian node first and then the tier-1 Historian node. A tier-2 node must use the same release of the Historian, or two releases newer than its tier-1 nodes. A tier-1 node cannot replicate to a tier-2 node running an earlier version of the Historian.