unique key prevents insertion of duplicates

modules/t/dbEntries.t

@@ -554,7 +554,7 @@ $multi->restore();
   my $no_desc_id_again = $dbEntryAdaptor->store($entry_no_desc, $gene->dbID(), 'Gene');
   is($no_desc_id_again, $no_desc_id, 'Checking the ID is consistent between store() invocations');
   is_rows(1, $db, 'xref', 'where description = ?', [q{}]);
-  is_rows(2, $db, 'object_xref');
+  is_rows(1, $db, 'object_xref');
   is_rows(0, $db, 'object_xref', 'where xref_id =?', [0]);
   
   $multi->restore('core', 'xref', 'object_xref');