next unless $old_quantity != $quantity || $old_primary_svc ne $primary_svc;
my $new_pkg_svc = new FS::pkg_svc( {
+ 'pkgsvcnum' => ( $old_pkg_svc ? $old_pkg_svc->pkgsvcnum : '' ),
'pkgpart' => $new->pkgpart,
'svcpart' => $part_svc->svcpart,
'quantity' => $quantity,