Lua Script inundate soulwar

[Azerty]

I'm trying to create soulwar's inundate script, does anyone know how to remove the inundate map? The lever is for reference only.

local positions = {
    Position(33862, 30999, 8)
}

function onThink(interval, lastExecution)
    local item
    for i = 1, #positions do
        item = Tile(positions[i]):getThing(1)
        if item and isInArray({1945, 1946}, item.itemid) then
            item:transform(item.itemid == 1945 and 1946 or 1945)
            if item.itemid == 1946 then
                Game.loadMap('data/world/inundate/inundate.otbm')
            end
        end
    end

    return true
end