# Introduction

Backward compatibility issues can occur when features or configurations in a previous release are not supported in a compatible way in the new release. Every consideration is given during OIPA development to preserve compatibility between releases; however, in some cases, a required feature cannot be implemented without introducing a configuration that has no counterpart in previous releases, or deprecating elements in the previous configuration that are incompatible with new features. Upgrading OIPA versions can present two types of backward compatibility issues:

- Changes to the database that have been automated with scripts provided by Oracle.

In some cases, the correspondence between the old and new configuration elements allows an automated transformation to convert old configuration elements to new ones. Automated scripts can perform generic updates for configuration elements that meet the conditions described in the release notes for each script.

- Changes to the database that you must manually configure.

Some elements of a configuration do not yield a one-to-one conversion from an old to a new configuration. Changes of this nature require a case-by-case analysis of the impact and necessary corrective actions for specific OIPA configurations.

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