umap - how to edit imported data

Hello, i'm importing osm data into umap (generated by overpass turbo). I use the import function, selecting the data-type, the layer to which the data is added and all works very well. But afterwards I like to edit the data in umap. For example: adding another description with a link to a picture. i can do this with manually added POIs, why not with imported data?

Thanks for any help, Kim