You can delete the entire map in the Navimow app.
Go to: Settings>MOWER>Mowing>Map Management, and click the delete icon at the upper right corner to delete the map.
Please make sure your phone is connected to Navimow i via Bluetooth.
You can easily modify parts of the map in the Navimow app without needing to recreate it. Simply go to Settings>MOWER>Mowing>Map Management, select the zone you want to edit, and tap the edit icon. From there, you can rename the zone, adjust the mowing height and direction, and enable edge mowing—all within the editing session.