Update "most users online" number
 

Hi!

During a migration to a new server in 2008, something happened to our cookie system and vbulletin started counting the online users multiple times.So while we were 40 users on line it eventually counted and displayed 460.
We have never surpassed this number.
It is a bit annoying and misleading so I wanted to ask if there is an update query in order to restore the "40" or at least which table stores these kind of statistics.
I am an SQL proffesional.

Thanx in advance!