Clone Spawning for everybody in the game?

So I wrote a boat shop script where if you have enough money and dont already own it you can buy and spawn the ship or spawn it if you already own it. The one problem is when one person tries to spawn their boat instead of their only being one multiple spawn depending on how many are in the server. Example if there is 5 people 5 boats will spawn and I have 0 clue why

local rem = game.ReplicatedStorage:WaitForChild("BoatRemote")

script.Parent.Triggered:Connect(function(player)
	rem:FireClient(player, "yes")
end)

^to activate the boat GUI

local rem = game.ReplicatedStorage:WaitForChild("BoatRemote")

rem.OnClientEvent:Connect(function(val, whatever)
	if val == "yes" then
		script.Parent.Visible = true
	end
end)

^getting the event and setting the GUI to visible

local rem = game.ReplicatedStorage:WaitForChild("BoatRemote")

local boat_desc = script.Parent.Parent.Parent["Boat Description"]
local spawn_button = boat_desc.SpawnButton
local player = game.Players.LocalPlayer
local exit_button = script.Parent.Parent.Parent.TextButton

local already_spawned

script.Parent.MouseButton1Click:Connect(function()
	boat_desc["Boat Name"].Text = "Schooner"
	
	if player.Boats_bought.schooner_ship.Value == 0 then
		boat_desc.SpawnButton.Text = "Buy"
	elseif player.Boats_bought.schooner_ship.Value == 1 and already_spawned == nil then
		boat_desc.SpawnButton.Text = "Spawn"
	else
		boat_desc.SpawnButton.Text = "Despawn"
	end
	
	boat_desc["Stats Window"].SpeedText.Text = "- Speed = 35"
	boat_desc["Stats Window"].HealthText.Text = "- Health = 600"
	boat_desc["Stats Window"].CannonText.Text = "- # Of Cannons = 4"
	
	boat_desc.BoatImage.Image = "rbxassetid://10811310900"
	
	boat_desc.BoatImage.ImageTransparency = 0
	
	boat_desc.Visible = true
end)

spawn_button.MouseButton1Click:Connect(function()
	if spawn_button.Text == "Buy" then
		if player.stats.Gold.Value >= 500 then
			player.stats.Gold.Value -= 500
			player.Boats_bought.schooner_ship.Value = 1
			spawn_button.Text = "Spawn"
		end
	else
		if already_spawned == nil then
			rem:FireServer("schooner")
			boat_desc.Visible = false
			script.Parent.Parent.Parent["Boat Description"].Visible = false
			script.Parent.Parent.Parent.Visible = false
			already_spawned = "yes"
		else
			rem:FireServer("despawn")
			already_spawned = nil
			script.Parent.Parent.Parent["Boat Description"].Visible = false
			script.Parent.Parent.Parent.Visible = false
		end
	end
end)

exit_button.MouseButton1Click:Connect(function()
	boat_desc.Visible = false
script.Parent.Parent.Parent.Parent.Background.Visible = false
end)

^boat buying system/GUI once bought or spawned will communicate with the spawn script and make it so no player can spawn more than one at a time

local rem = game.ReplicatedStorage:WaitForChild("BoatRemote")

local schooner

rem.OnServerEvent:Connect(function(player, val)
	if val == "schooner" then
		schooner = game.ReplicatedStorage.Boats.SchoonerShip:Clone()
		schooner.Parent = workspace
	elseif val == "despawn" then
		schooner:Destroy()
	end
end)

^boat spawn

Is the script that clones the object a local script if you only want to copy it for one person?