Joomla migration Unfortunately Joomla upgrade is not automatic in any way. So if you are trying to update you Joomla version from the last LTS (1.5) release to the current LTS (2.5) prepare for trouble. Many framework changes in Joomla! like nested categories and new ACL system make the migration very painfull, for a complicated Joomla installation. Semi – Automatic migration with JUpgrade First of all upgrade to the latest Joomla 1. ...