Sadly, in the dark ages before the new release system was deployed on drupal.org, issues were filed against a moving target "cvs" version of the Drupal core project. Some of these issues are many years old from the the 4.2.x days. Others were created 2006-11-10 for the 5.0-beta-x releases. The thing is, we just don't know. In the future, we'll never face this problem again, since the "HEAD" will always have a reasonable name like "5.x-dev" or "6.x-dev". So this release is just a place holder for all the old issues that don't know what version they are. Enthusiastic issue queue participants are encouraged to seek out these issues and attempt to reclassify them against the most appropriate version of core.