I would like to upgrade our current Jira software 8.5.1 to 8.15.1. Do I need to install versions in between or going to 8.15.1 is all accumulative? Is there documentation you all can send me with this upgrade?
Check the upgrade compatibility - softwares and platform support and make sure both versions support same database version and other plugins.
Check the below links and see if there are any differences. If same, you can proceed.
Safest Upgrade Procedure:
Always have a TEST environment with Developer License which is equivalent to your PROD.
Upgrade the TEST environment first and do a sanity testing (you can skip the backup so upgrade will be faster). Once successful, you can do the same exercise in PROD environment.
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