Migrating from a previous release
Migration from an earlier version of Sakai typically involves a database conversion (for which scripts are supplied with the release), an update to any custom skins, and possibly changes to any custom code.
For links to the conversion scripts, see the Database Migration section of this guide.
Changes in sakai.properties
In addition to new sakai.properties values introduced for Sakai 2.5, there are also some changes to address when upgrading from a previous version of Sakai: