When your Home Assistant is outdated. I meand not updated for a while.
Then the update will be to the latest version.
Sometimes there are so many breaking changes that its hard to get them all at once.
So when you will update and can choose the “next” major release after your current version. You can Fix those breaking changes. Test your system and then upgrade to the next major release. And repeat this until you are at the most resent version.
I know it is best to update frequently. But in some cases you want to set an home assisntant and leave it for a while.