The IDES Release Strategy 

A new version of IDES is available with every correction release. It is not possible to upgrade an existing IDES version to a new release. You can, however, install service packages for the corresponding correction release. This means that every new IDES Release involves a new installation. The IDES Release Strategy ensures that you always get new master data, transaction data, customizing functions, and documentation that are tested and checked for quality.