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) by with error:

PHP Code:

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:

PHP Code:

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