XF 2.1 Query compatibility question

[DCMS]

Hi guise, is this query (for xen 1) compatible with Last new xenforo 2?

Rich (BB code):
UPDATE xf_post
SET user_id = new_user_id, username = 'new username'
WHERE username = 'old username'
AND user_id = 0;

UPDATE xf_thread
SET user_id = new_user_id, username = 'new username'
WHERE username = 'old username'
AND user_id = 0;

I have many imported users as registered group, last days after a re-import of partial vbulletin nodes, inside these nodes you can see all the writers users as a guest, but in the reality they already exist in the forum as a registered user. So, in a present discussion you can see them like a registered and are clickable to them profile page, in these recent imported nodes you can see them names like a guest.
I need to unify those guest users with their real existing profile.
So i'm asking if this query is good for my purpose and if is it compatible with xen 2.

thanks.