There isn't a fast easy way to do this in the ui (save going into each ticket and changing the owner).I think that the easiest way would be to look at the ost_user table.Identify the dupes by name (note the id's)for example:8,0,8,0,Faker,date,date112,0,112,0,Fake Name,date,date157,0,157,0,Faux Name,date,datePresuming that Faker is the one that you want to keep you then look at ost_ticket you could do something like:UPDATE ost_ticket SET user_id='8',user_email_id='8' WHERE user_id='112';andUPDATE ost_ticket SET user_id='157',user_email_id='157' WHERE user_id='157';now all the tickets that used to be owned by 112 and 157 are now owned by user 8.NOTE: make sure you back up your DB before you start issuing SQL level commands.