[Blog] 4.2.2 Blog Upgrade MySQL Error

[RoboCop1985]

Unexpected Text:
<?xml version="1.0" encoding="windows-1252"?>
                                                                                                                    <?xml version="1.0" encoding=""?>
<errors>
    <error><![CDATA[<p>Database Error</p>

Invalid SQL:
UPDATE language SET title = title, phrasegroup_global = 'a:1215:{s:9:\"1_day_ago\";s:12:\.......

<strong>MySQL Error</strong>   : Got a packet bigger than 'max_allowed_packet' bytes<br />
<strong>Error Number</strong>  : 1153<br />
<strong>Request Date</strong>  : Monday, October 14th 2013 @ 03:21:05 PM<br />
<strong>Error Date</strong>    : Monday, October 14th 2013 @ 03:21:24 PM<br />
<strong>Script</strong>        : http://apg-clan.org/install/upgrade.php<br />
<strong>Referrer</strong>      : http://apg-clan.org/install/upgrade.php<br />
<strong>Classname</strong>     : vB_Database<br />
<strong>MySQL Version</strong> : 5.1.66-0+squeeze1-log<br />
</p>]]></error_html>
</errors>

I've been upgrading my site to vB 4.2.2 but the Blog addon update appears to be failing. I'm not sure what this error from above means.

But the rest of the vBulletin site, themes and the rest seems fine.