# Pastebin 5iHT6O4j
21567 $DBversion = '19.12.00.067';
21568 if( CheckVersion( $DBversion ) ) {
21569     # From: https://stackoverflow.com/questions/3311903/remove-duplicate-rows-in-mysql
21570     $dbh->do(q|
21571         DELETE a
21572         FROM virtualshelfshares as a, virtualshelfshares as b
21573         WHERE
21574           a.id < b.id 
21575         AND
21576           a.borrowernumber IS NOT NULL
21577         AND
21578           a.borrowernumber=b.borrowernumber
21579         AND
21580           a.shelfnumber=b.shelfnumber
21581     |);
21582 
21583     NewVersion( $DBversion, 20754, "Remove double accepted list shares" );
21584 }