diff --git a/webtools/bugzilla/Bugzilla/DB/Schema.pm b/webtools/bugzilla/Bugzilla/DB/Schema.pm
index 1888c76c06aa..a26eb311b663 100644
--- a/webtools/bugzilla/Bugzilla/DB/Schema.pm
+++ b/webtools/bugzilla/Bugzilla/DB/Schema.pm
@@ -915,7 +915,7 @@ use constant ABSTRACT_SCHEMA => {
         FIELDS => [
             series_id   => {TYPE => 'MEDIUMSERIAL', NOTNULL => 1,
                             PRIMARYKEY => 1},
-            creator     => {TYPE => 'INT3', NOTNULL => 1},
+            creator     => {TYPE => 'INT3'},
             category    => {TYPE => 'INT2', NOTNULL => 1},
             subcategory => {TYPE => 'INT2', NOTNULL => 1},
             name        => {TYPE => 'varchar(64)', NOTNULL => 1},
diff --git a/webtools/bugzilla/Bugzilla/Install/DB.pm b/webtools/bugzilla/Bugzilla/Install/DB.pm
index d34a11f24e69..a7f20625a3dc 100644
--- a/webtools/bugzilla/Bugzilla/Install/DB.pm
+++ b/webtools/bugzilla/Bugzilla/Install/DB.pm
@@ -277,6 +277,14 @@ sub update_table_definitions {
     _remove_spaces_and_commas_from_flagtypes();
     _setup_usebuggroups_backward_compatibility();
     _remove_user_series_map();
+
+    # 2006-08-03 remi_zara@mac.com bug 346241, make series.creator nullable
+    # This must happen before calling _copy_old_charts_into_database().
+    if ($dbh->bz_column_info('series', 'creator')->{NOTNULL}) {
+        $dbh->bz_alter_column('series', 'creator', {TYPE => 'INT3'});
+        $dbh->do("UPDATE series SET creator = NULL WHERE creator = 0");
+    }
+
     _copy_old_charts_into_database();
 
     _add_user_group_map_grant_type();
@@ -1877,9 +1885,8 @@ sub _copy_old_charts_into_database {
 
             foreach my $field (@fields) {
                 # Create a Series for each field in this product.
-                # user ID = 0 is used.
                 my $series = new Bugzilla::Series(undef, $product, $all_name,
-                                                  $field, 0, 1,
+                                                  $field, undef, 1,
                                                   $queries{$field}, 1);
                 $series->writeToDatabase();
                 $seriesids{$field} = $series->{'series_id'};
@@ -1890,7 +1897,7 @@ sub _copy_old_charts_into_database {
             my @openedstatuses = ("UNCONFIRMED", "NEW", "ASSIGNED", "REOPENED");
             my $query = join("&", map { "bug_status=$_" } @openedstatuses);
             my $series = new Bugzilla::Series(undef, $product, $all_name,
-                                              $open_name, 0, 1,
+                                              $open_name, undef, 1,
                                               $query_prod . $query, 1);
             $series->writeToDatabase();
             $seriesids{$open_name} = $series->{'series_id'};
diff --git a/webtools/bugzilla/Bugzilla/Series.pm b/webtools/bugzilla/Bugzilla/Series.pm
index 4693a7131b3b..011e60168f60 100644
--- a/webtools/bugzilla/Bugzilla/Series.pm
+++ b/webtools/bugzilla/Bugzilla/Series.pm
@@ -36,8 +36,6 @@ use Bugzilla::Error;
 use Bugzilla::Util;
 use Bugzilla::User;
 
-use constant PUBLIC_USER_ID => 0;
-
 sub new {
     my $invocant = shift;
     my $class = ref($invocant) || $invocant;
@@ -201,10 +199,9 @@ sub writeToDatabase {
         # Insert the new series into the series table
         $dbh->do("INSERT INTO series (creator, category, subcategory, " .
                  "name, frequency, query, is_public) VALUES " . 
-                 "($self->{'creator'}, " . 
-                 "$category_id, $subcategory_id, " .
-                 $dbh->quote($self->{'name'}) . ", $self->{'frequency'}," .
-                 $dbh->quote($self->{'query'}) . ", $self->{'public'})");
+                 "(?, ?, ?, ?, ?, ?, ?)", undef,
+                 $self->{'creator'}, $category_id, $subcategory_id, $self->{'name'},
+                 $self->{'frequency'}, $self->{'query'}, $self->{'public'});
 
         # Retrieve series_id
         $self->{'series_id'} = $dbh->selectrow_array("SELECT MAX(series_id) " .
diff --git a/webtools/bugzilla/sanitycheck.cgi b/webtools/bugzilla/sanitycheck.cgi
index 0a756c3fb154..174edc9c39e5 100755
--- a/webtools/bugzilla/sanitycheck.cgi
+++ b/webtools/bugzilla/sanitycheck.cgi
@@ -445,7 +445,7 @@ CrossCheck("profiles", "userid",
            ["logincookies", "userid"],
            ["namedqueries", "userid"],
            ["namedqueries_link_in_footer", "user_id"],
-           ['series', 'creator', 'series_id', ['0']],
+           ['series', 'creator', 'series_id'],
            ["watch", "watcher"],
            ["watch", "watched"],
            ['whine_events', 'owner_userid'],