DBA::delete('post-tag', ['cid' => $old_cid]);
DBA::update('item', ['author-id' => $new_cid], ['author-id' => $old_cid]);
DBA::update('item', ['owner-id' => $new_cid], ['owner-id' => $old_cid]);
DBA::delete('post-tag', ['cid' => $old_cid]);
DBA::update('item', ['author-id' => $new_cid], ['author-id' => $old_cid]);
DBA::update('item', ['owner-id' => $new_cid], ['owner-id' => $old_cid]);