Update the Puppetfile with the latest versions for the release. This requires to be complete.
(You might just wait for all of 6887 to be complete and merge the changes in from the puppetfile in simp-core. It is up to you.)
Then run the safe_r10k deploy. Before you do let everyone know so they are sure to save off any of the changes they may have made that need to be saved to the site or control repository.