Openstack update 12 to 13 ("openstack overcloud update stack" missed)

Hello folks,

we are facing issue during the update preparation from pike(12) to queens(13)
according to the official update document

"https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/13/html/upgrading_red_hat_openstack_platform/assembly-preparing_for_openstack-platform_upgrade#performing-a-minor-update-of-a-containerized-overcloud"
I should execute this command openstack overcloud update stack
but the command does not exist.

has someone faced same experience with it and can someone provide please a solution?

Thanks and lot in advance
appreciate your help

Br
Niko