Fixed a bug: avoid bogus tags on nodes moved forth and back.
Fixed a bug: avoid bogus tags on nodes moved forth and back.

drolbr/Overpass-API,bhargavpanth/Overpass-API,mmd-osm/Overpass-API,elbakai/Overpass-API,drolbr/Overpass-API,drolbr/Overpass-API,elbakai/Overpass-API,mmd-osm/Overpass-API,bhargavpanth/Overpass-API,mmd-osm/Overpass-API,bhargavpanth/Overpass-API,elbakai/Overpass-API,elbakai/Overpass-API,elbakai/Overpass-API,elbakai/Overpass-API,bhargavpanth/Overpass-API,drolbr/Overpass-API,mmd-osm/Overpass-API,bhargavpanth/Overpass-API,drolbr/Overpass-API,bhargavpanth/Overpass-API,drolbr/Overpass-API