Script is working but another players cant see the damage?

When i attack a dummy another player doesnt see how many damage i did on that dummy, but i can see it. On my screen, the dummy's health is going low when i hit it, but on another players screen, its not going low. Its staying still. And i cant see what another player done too.

local Attack = true


script.Parent.Activated:Connect(function()
wait(0.1)

if Attack == true then		
Attack = false	
local character = script.Parent.Parent
local Humanoid = character:WaitForChild('Humanoid')

repeat
wait()
	until character:FindFirstChild("HumanoidRootPart")
	
local part = Instance.new("Part", game.Workspace)
	part.CanCollide = false
	part.CFrame = character.HumanoidRootPart.CFrame
	part.Size = Vector3.new(7.3, 4 ,3)
	part.Transparency = 0.5

local Weld = Instance.new("Weld", part)
	Weld.Part0 = character.HumanoidRootPart
	Weld.Part1 = part
	Weld.C1 = CFrame.new(0, 1, 2.5)
	Weld.C0 = CFrame.new()

	part.Touched:Connect(function(p)
		
		
	local hum = p.Parent:FindFirstChildOfClass("Humanoid")
   		 if p.Parent.Name == ("Mob") then
			if script.Parent.CanDamage.Value == true then
				
				script.Parent.CanDamage.Value = false
   					hum:TakeDamage(math.random(9,23))
    			wait(0.15)
				script.Parent.CanDamage.Value = true
				
			end

		end
	end)


wait(0.15)
part:Destroy()
wait(0.5)
Attack = true	
	
end

end)

Is it a problem of a LocalScript? When i do this on normal script, i can damage on studio but not in normal game. If i do it on LocalScript, then this problem happening.

It's called FilteringEnabled and it prevents most of the client's changes from replicating on to the server, meaning if something changes on the client only, the server will not listen to the client and will not change anything on his side, to go around this as a developer, use remote functions and events as well as server-side handlers to go along with them.