Upgrading Redmine to 7.0: what changes, what breaks, and the steps
How to upgrade Redmine to 7.0: the Ruby, Rails and database requirements, the upgrade steps from redmine.org, the plugin check, and what 7.0 changes.

Jobin Joseph is the founder and technical lead of RedminePRO at HAZERCLOUD, an AWS Advanced Tier Services Partner. He works on Redmine migration, operations and hosting.
How to upgrade Redmine to 7.0: the Ruby, Rails and database requirements, the upgrade steps from redmine.org, the plugin check, and what 7.0 changes.
Redmine is free, open-source project management software. What it does, what it costs to run on your own server, and what managed Redmine hosting costs.
Back up the Redmine database, files directory and configuration, restore each part, then verify the restore in a throwaway environment. Step by step.