Error in free area calculation

[c0nb4]

Currently the JSON has the following structure. Total Wall area always needs to be the sum of free wall area and connected wall area.

"DEBE3DATKB100008VI": {
    "gml_id": "DEBE3DATKB100008VI",
    "178.0766988149437": {
        "surface_id": "ID_ccf4ff19-9c85-4313-9531-d8f82b3f6df5",
        "total_wall_area": 22.9126553025392,
        "connected_wall_area": 0,
        "free_wall_area": 0
    },
    "358.0766988149437": {
        "surface_id": "ID_91a2ad1b-9679-4e1e-8310-09421dac9572",
        "total_wall_area": 22.91265530252687,
        "connected_wall_area": 0,
        "free_wall_area": 0
    },
    "266.37974225177186": {
        "surface_id": "ID_eafd6c8b-ce5e-4a10-8779-de2c47f1095d",
        "total_wall_area": 9.438835523176209,
        "connected_wall_area": 0,
        "free_wall_area": 0
    },
    "238.83253330982916": {
        "surface_id": "ID_cbf32a51-277b-4aa1-8096-cacd5ade1e6c",
        "total_wall_area": 23.489115063483446,
        "connected_wall_area": 0,
        "free_wall_area": 0
    },
    "265.64151927097896": {
        "surface_id": "ID_28781196-0c4c-43dd-9336-c63db000d248",
        "total_wall_area": 23.373099856280355,
        "connected_wall_area": 0,
        "free_wall_area": 0
    },
    "266.3854176999966": {
        "surface_id": "ID_b6ed905a-290d-4941-b09f-f3844dec573d",
        "total_wall_area": 9.437774404784138,
        "connected_wall_area": 0,
        "free_wall_area": 0
    },
    "85.64151927097893": {
        "surface_id": "ID_32305cc9-3ee3-4e10-8fb8-ae7bfad99154",
        "total_wall_area": 23.373099855908855,
        "connected_wall_area": 0,
        "free_wall_area": 0
    },
    "58.83253330982917": {
        "surface_id": "ID_d083a083-32f5-48b0-9929-1663065bef8d",
        "total_wall_area": 23.489115062767382,
        "connected_wall_area": 0,
        "free_wall_area": 0
    },
    "177.0084821619388": {
        "surface_id": "ID_b076427e-081c-44f0-a807-d2189cf656f3",
        "total_wall_area": 5.096945753658079,
        "connected_wall_area": 0,
        "free_wall_area": 0
    },
    "265.6476001128081": {
        "surface_id": "ID_3811481a-38b5-4441-bbb9-a9ae35d9af1e",
        "total_wall_area": 23.965315322644084,
        "connected_wall_area": 0,
        "free_wall_area": 0
    },
    "85.64760011280812": {
        "surface_id": "ID_620526aa-c8d0-496a-89cb-3de58760ee41",
        "total_wall_area": 23.96531532337219,
        "connected_wall_area": 0,
        "free_wall_area": 0
    }
},