I have made my first mod but the map just doesnt work

[Melosxyz]

I made a map that replaces leah's house, but it just doesnt change, code below

 "Changes": [
              {
                "Action": "EditMap",
                "Target": "Maps/LeahHouse",
                "FromMapFile": "assets/Maps/LeahNewHouse.tmx"
              }
]