XF 2.1 How to unify register user with a guest

[DCMS]

Hi guise, are more then 4 days that i have no answer in a discussion here.
I just need support about unify a registered user with a guest user (that have the same name).

this is becouse of a vbulletin bad import. And now I can’t re-import all database becouse the forum is already online.

there is just a one forum with all discussions and reply post as a guest. But those guest already exist as a registereduser in all other forums

 

[djbaxter]

Change author [Paid]

AndyB submitted a new resource: Change author - Allows changing the author of a post. Premium upgrade: For $25.00 USD this add-on along with the entire collection may be downloaded for up to one year. Please see the colletion in the Resources area at this URL: https://www.xf2addons.com/...

xenforo.com

And if you need to change the date of posts as well

Change date

Premium upgrade: This XF2 add-on along with the entire collection can be purchased for $35.00 USD. Your Premium upgrade will allow you to download as many XF2 add-ons as you like for one year. Please see the entire collection located in the...

xenforo.com

 

[DCMS]

no wait, thanks for the reply but... i don't think that this is what i need.
This addon allow to change only ONE "post owner" at time.
I can't update manually 84.500 messages...
I have +8000 discussions with 84.500 posts writes by (figured) guests with the exatly nickname of the already existing users.
Is there no way to unify user with guest and update all the data counts?

this becous of bad import from vbulletin database.