Roblox Studio ошибка в скрипте

Ошибка: Network Ownership API cannot be called on Anchored parts or parts welded to Anchored parts. - Server - Tower:55
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Скрипт:
local PhysicsService = game:GetService("PhysicsService")
local ServerStorage = game:GetService("ServerStorage")
local ReplicatedStorage = game:GetService("ReplicatedStorage")

local events = ReplicatedStorage:WaitForChild("Events")
local spawnTowerEvent = events:WaitForChild("SpawnTower")
local animateTowerEvent = events:WaitForChild("AnimateTower")

local tower = {}

function FindNearestTarget(newTower)
local maxDistance = 15
local nearestTarget = nil

for i, target in ipairs(workspace.Mobs:GetChildren()) do
local distance = (target.HumanoidRootPart.Position - newTower.HumanoidRootPart.Position).Magnitude
print( target.Name , distance)
if distance < maxDistance then
print( target.Name , "is the nearest target found so far")
nearestTarget = target
maxDistance = distance
end
end

return nearestTarget
end


function tower.Attack(newTower)
local target = FindNearestTarget(newTower)

if target and target:FindFirstChild("Humanoid") and target.Humanoid.Health > 0 then

local targetCFrame = CFrame.lookAt(newTower.HumanoidRootPart.Position, target.HumanoidRootPart.Position)
newTower.HumanoidRootPart.BodyGyro.CFrame = targetCFrame

target.Humanoid:TakeDamage(25)
end

task.wait(1)

animateTowerEvent:FireAllClients(newTower, "Attack")

tower.Attack(newTower)
end

function tower.Spawn(player, name, cframe)
local towerExists = ReplicatedStorage.Towers:FindFirstChild(name)

if towerExists then

local newTower = towerExists:Clone()
newTower.HumanoidRootPart.CFrame = cframe
newTower.Parent = workspace.Towers
newTower.HumanoidRootPart:SetNetworkOwner(nil)

local bodyGyro = Instance.new ("BodyGyro")
bodyGyro.MaxTorque = Vector3.new (math.huge, math.huge, math.huge)
bodyGyro.D = 0
bodyGyro.CFrame = newTower.HumanoidRootPart.CFrame
bodyGyro.Parent = newTower.HumanoidRootPart

for i, object in ipairs(newTower:GetDescendants()) do
if object:IsA("BasePart") then
object.CollisionGroup = "Tower"
end
end

coroutine.wrap(tower.Attack)(newTower)
else
warn("Requested tower does not exist", name)
end
end

spawnTowerEvent.OnServerEvent:Connect(tower.Spawn)

return tower