View file PF.Base/module/event/install/version/3.3.0.xml.php
<upgrade>
<sql><![CDATA[a:1:{s:9:"ADD_FIELD";a:1:{s:17:"phpfox_event_feed";a:1:{s:16:"parent_module_id";a:4:{i:0;s:8:"VCHAR:75";i:1;N;i:2;s:0:"";i:3;s:3:"YES";}}}}]]></sql>
</upgrade>
<upgrade>
<sql><![CDATA[a:1:{s:9:"ADD_FIELD";a:1:{s:17:"phpfox_event_feed";a:1:{s:16:"parent_module_id";a:4:{i:0;s:8:"VCHAR:75";i:1;N;i:2;s:0:"";i:3;s:3:"YES";}}}}]]></sql>
</upgrade>