Older Migration Guides Migration from old versions: 2.5.x to 2.6.x 2.4.x to 2.5.x 2.3.x to 2.4.x 2.2.x to 2.3.x 2.1.x to 2.2.x 2.0.x to 2.1.x 1.3.x to 2.0.x.