To make things a little bit easier and reduce the chances to forget stuff, let's modify the switchover template to split the following step into two:

The current template says (this is an example of https://phabricator.wikimedia.org/T363672):

• Set NEW primary with weight 0 (and depool it from API or vslow/dump groups if it is present).

sudo dbctl instance db1223 set-weight 0
sudo dbctl config commit -m "Set db1223 with weight 0 T363672"

Let's split that into two steps:

• Set NEW primary with weight 0.

sudo dbctl instance db1223 set-weight 0
sudo dbctl config commit -m "Set db1223 with weight 0 T363672"

• Depool NEW from any specific group (API, vslow, dump) if present

sudo dbctl instance db1223 edit
# If some changes were made:
sudo dbctl config commit -m "Remove db1223 from API  T363672"