my ($args) = @_;
my ( $dbh, $out ) = @$args{qw(dbh out)};
if( !column_exists( 'itemtypes', 'checkprevcheckout' ) ) {
if ( !column_exists( 'itemtypes', 'checkprevcheckout' ) ) {
$dbh->do(
q{
ALTER TABLE itemtypes
-