$condition = ["`uid` = ? AND `uri` = ? AND `network` IN (?, ?)",
$importer["uid"], $item["uri"], NETWORK_FEED, NETWORK_DFRN];
$previous = Item::selectFirst(['id'], $condition);
$condition = ["`uid` = ? AND `uri` = ? AND `network` IN (?, ?)",
$importer["uid"], $item["uri"], NETWORK_FEED, NETWORK_DFRN];
$previous = Item::selectFirst(['id'], $condition);