Umap: Delete or Edit old Demo-Map

Dear guys,

I already tried to create a individual map with umap. So - it works. Nice. But I didn't register already. Now I can't either delete n'or edit this Demo-Map. Can you help me? I don't want these map online in this unfinished shape. I just wan't to delete the old and create a new map with my Account.

Link to Map: https://umap.openstreetmap.de/de/map/initiativenkarte-bochum_17075#13/51.4743/7.1640

Thank you very much und kind regards, Julie from Germany.