Why isnt my script moving the entire dummy?

Ok so in my game i have a script that moves a monster when the game starts which is currently just a dummy. But when i tell my script to move the HumanoidRootPart it only moves the actual HumanoidRootPart and not the entire body as it should. Does anyone know why this is?

There is no error's in the console.

ServerScript that moves the dummy

wait(1)
local map = workspace.Map.Value
local Map = workspace:FindFirstChild(map)

if not Map then
    print("could not find requested map : ".. map)
end

local MonsterSpawn = Map:WaitForChild("monsterSpawn"):GetChildren() -- gets all the possible spawnlocations
local randomMonsterSpawn = MonsterSpawn[math.random(1, #MonsterSpawn)] -- Chooses a random spawnlocation
local Monster = game.ServerStorage.grandiosav5

Monster.Parent = workspace
Monster.HumanoidRootPart.Position = randomMonsterSpawn.Position -- moves the monster (issue is located here)