How to apply new deduplication algorithm to old vault after last update?

I have performed an v.6 update (build 43719) on my Acronis Backup 11.5 Adv. (on Win. 2012 Server).

The changelog informs:
"To apply the new deduplication algorithm to an old vault, you need to recreate the vault’s deduplication database. For more information, see "How to migrate to Update 6 deduplication" in the product Help or the User Guide."

I can not find any information on how to migrate to Update 6 deduplication anywhere in the product help or in the user guide.
Where can I find this guide?

Thanks