We are using Jira Server v. 8.14 and expecting to upgrade soon to 8.20.
In the system I found very old data since 2008!
Its related to old projects and unused issuetypes, but the data is still in the system.
As in server we cant use the archive mode, thinking to create a clone of the production environment for backup and to start to delete the issues in production.
What is the best practice to delete such information? I would like to keep only issues from the last 2-3 years.