WARNING: Version 6.1 of the Elastic Stack has passed its EOL date.
This documentation is no longer being maintained and may be removed. If you are running this version, we strongly advise you to upgrade. For the latest information, see the current release documentation.
This section discusses the changes that you need to be aware of when migrating your application from one version of X-Pack to another.
As a general rule, we strive to keep backwards compatibility between minor versions (for example, 5.x to 5.y), but there might be breaking changes between major versions (for example, 5.x to 6.y). Breaking changes are also listed at the top of the release notes for each version.