D20 mapped room wrong

We have a bedroom that the D 20 mapped in accurately. It shows to be almost twice the size.  How do I edit the map to correct that or since the extended map is actually on the outside of the house maybe it doesn’t matter

Place a room divider to section off the inaccessible area, then hide it from your map.

Sorry about your D20’s wrong bedroom mapping, please wipe the robot’s front and bottom edge sensors clean, rearrange furniture, cover mirrors or mark hard zones as no-go areas then rebuild the map in the app. Feel free to reach our support via App live chat or email support.na@dreame.tech anytime!