While working on https://github.com/eclipse-platform/eclipse.platform.releng.aggregator/pull/3131 I noticed that some fragments are still on version 6, even though most of them are at version 12, see for example this one: https://github.com/eclipse-cdt/cdt/blob/fec29d7713831a4da9a9f578d6e7bca38647ebd6/core/org.eclipse.cdt.core.linux/META-INF/MANIFEST.MF#L5