Fetal error in upgrade vb 4.2.2 to vb 5.1.6

[arshadeomran]

Hi there,
I want to upgrade vb 4.2.2 to vb 5.1.6
Upgrade starts and stops at 16% (step 142) with below error:

1Unexpected Text:
<?xml version="1.0" encoding="UTF-8"?>
<upgrade>
</upgrade>
<fatal_error>
    <description>23 occurred in /home/arshadeomran/public_html/core/vb5/route/channel.php in line 23</description>
</fatal_error>

Also I have recieved another error from Database:

Database error in vBulletin 4.2.2:

                        Invalid SQL:
INSERT  IGNORE  INTO session (`sessionhash`,`userid`,`host`,`idhash`,`lastactivity`,`location`,`styleid`,`languageid`,`loggedin`,`inforum`,`inthread`,`incalendar`,`badlocation`,`useragent`,`bypass`,`profileupdate`,`apiclientid`,`apiaccesstoken`,`emailstamp`)
                        VALUES('ef8af00a5b6cd22ee6a1a09adce637b7',0,'66.249.79.128','a253d6c8f30bcaa7873680f4041400b2',1429781746,'',1,5,0,0,0,0,0,'DoCoMo/2.0 N905i(c100;TB;W24H16) (compatible; Googlebot-Mobile/2.1; +http://www.google.com/bot.html)',0,0,0,'',0)
/**session**/;

                        MySQL Error   : Unknown column 'emailstamp' in 'field list'
                        Error Number  : 1054
                        Request Date  : Thursday, April 23rd 2015 @ 02:05:46 PM
                        Error Date    : Thursday, April 23rd 2015 @ 02:05:46 PM
                        Script        : http:///showthread.php?t=5&goto=newpost
                        Referrer      :
                        IP Address    : 66.249.79.128
                        Username      : guest
                        Classname     : vB_Database_MySQLi
                        MySQL Version : 

How do I fix this error?
Thanks

[arshadeomran]

Help me, please

[TwinsForMe]

That's where I stalled out too.

Try this:

Once you have stalled, go to your core/inludes/config.php file and make sure your superadministrator number is correct. Then restart the upgrade.

I hope that helps.

[BirdOPrey5]

Make sure the administrator account you are logged into before you begin the upgrade is the account with the lowest userid among all Administrator accounts. Also make sure this user is a super-administrator.