Foreman puppet4 upgrade: witch procedure?

Hello,

I want to in place upgrade our Foreman instance (no katello, all in one,
running puppet master) to Puppet 4 AIO.

I am confused what procedure to follow:

Katello Doc[1]:

foreman-installer --upgrade-puppet

  • or -

The Foreman Wiki[2] procedure?

Should [1] not be applicable, what could be the reasoning having this
option for Katello but not Foreman?

Thanks!

[1] Foreman :: Plugin Manuals
[2]
Upgrading from Puppet 3 to 4 - Foreman

··· -- Daniel Helgenberger (helge000) daniel@helgenberger.net