diff --git a/db/install.xml b/db/install.xml
index 7b729e5..8e92133 100644
--- a/db/install.xml
+++ b/db/install.xml
@@ -56,7 +56,7 @@
         <FIELD NAME="title" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" COMMENT="Title for the page. All pages must have a title, but the start page for the wiki is set to empty string."/>
         <FIELD NAME="currentversionid" TYPE="int" LENGTH="10" NOTNULL="false" SEQUENCE="false" COMMENT="Points to the most recent entry in ouwiki_versions. This is the entry that will appear when viewing the page normally. May be null if there are no versions of the page yet."/>
         <FIELD NAME="locked" TYPE="int" LENGTH="1" NOTNULL="true" DEFAULT="0" SEQUENCE="false" COMMENT="Allows the page to be locked. Introduced with the Annotations commenting system to allow page locking while editing annotations."/>
-        <FIELD NAME="firstversionid" TYPE="int" LENGTH="10" NOTNULL="true" DEFAULT="0" SEQUENCE="false" COMMENT="Points to the entry in ouwiki_versions that first related to this page. This is used for participation calculations to help with query load at that point."/>
+        <FIELD NAME="firstversionid" TYPE="int" LENGTH="10" NOTNULL="false" DEFAULT="0" SEQUENCE="false" COMMENT="Points to the entry in ouwiki_versions that first related to this page. This is used for participation calculations to help with query load at that point."/>
       </FIELDS>
       <KEYS>
         <KEY NAME="primary" TYPE="primary" FIELDS="id" COMMENT="primary key of the table, please edit me"/>