Information from RU portal
Download version 1.6 in advance today! The update itself will be released shortly after the preload version.
The preliminary distribution of the update will reduce the load on gaming services on the day of its official release. And you, having downloaded the new version in advance, will be able to try it right away, as soon as it is released.
Downloading will consist of one step.
Preloading may be available periodically. If you don’t download anything, you should wait and try again after a while.