what about you: * download the data into JOSM, * save the data in an `.osm` file, * edit it with your favourite text editor (or even through `sed -i`), * reload into JOSM, * upload to OSM? (but I support the answer by [msiipola](https://help.openstreetmap.org/users/20620/msiipola), [h_mlet](https://help.openstreetmap.org/users/13231/h_mlet), the OP's question is really a very good use case for [level0](http://level0.osmz.ru/))

what about you: * download the data into JOSM, * save the data in an `.osm` file, * edit it with your favourite text editor (or even through `sed -i`), * reload into JOSM, * upload to OSM?OSM? (but I support the answer by [msiipola](https://help.openstreetmap.org/users/20620/msiipola), the OP's question is really a very good use case for [level0](http://level0.osmz.ru/))

what about you: * download the data into JOSM, * save the data in an `.osm` file, * edit it with your favourite text editor (or even through `sed -i`), * reload into JOSM, * upload to OSM?