Updating & upgrading

Update to the latest Joomla 5.4 and PHP 8.3, make a backup, and turn off the old Backward Compatibility plugin. Then set the update channel to "Joomla Next" and run the update – on a test copy of your site first.

The download was damaged. Click Check for updates and try again; if it fails again, download the update package from joomla.org and use Upload & Update.

Only after everything works without it. It keeps older extensions running; turn it off on a copy of your site first and test.

Back up first, then open System → Update → Joomla and click Update. Patch updates (like 6.2.1 → 6.2.2) take a minute and keep your content and settings.

Update to the latest Joomla 4.4, run the Pre-Update Check, update your extensions, then update to Joomla 5.

No. Go one major version at a time: Joomla 4.4 → 5.4 → 6. Each step only takes a few minutes once your extensions are ready.

Update it, ask its developer, or replace it. If you don't use it, uninstall it before you upgrade.

The server blocked or cut off the update. Use Upload & Update with the package from joomla.org, and ask your host about ModSecurity or time limits.

Whether your PHP settings and each installed extension are ready for the next version. Green means ready; fix or replace anything that isn't.

Raise max_execution_time to 300 and memory_limit to 256M in your PHP settings, then run the update again.

Click Check for updates in System → Update. If nothing shows, check the update channel in Options and that "Joomla! Core" is enabled in System → Update Sites.

Not with a button. Restore the backup you made before updating; that is why you always back up first.

Yes, from Joomla 5.4: System → Update → Joomla → Options → Automated Updates. New sites have it on; sites updated from older versions turn it on there. It updates Joomla itself, not extensions.

Make a copy: back up with Akeeba Backup, restore it on a staging subdomain with Kickstart, and update the copy first.