alter table library add column pid_album varchar default '' not null;
alter table library add column pid_track varchar default '' not null;
alter table library add column scanned_pid_album varchar default '' not null;
alter table library add column scanned_pid_track varchar default '' not null;
update library set
scanned_pid_album = coalesce((select value from property where id = 'PIDAlbum'), ''),
scanned_pid_track = coalesce((select value from property where id = 'PIDTrack'), '');
delete from property where id in ('PIDAlbum', 'PIDTrack');
SELECT 1;