How do I modify this script that prevents the player teleporting and other fixing I need (?)

Hello!

So, I made a system where If you use a tool It will morph you Into a troll, however the morph will not go away If the user resets or rejoin

But the problem with the system Is:

1. If you reset or rejoin, you will be teleported to the morphs location
2. I want the system to be modify so that the system can tell what morph to give you (What I mean Is that If the player uses a tool, It was a 1/2 chance of giving you either a:

Rare or Common troll

If the system decides to give you a Common or Rare troll, It will need to select the said morph and give It to you)

Notes: The default player uses a custom default player, basically If you join, your a troll Instead of your usual avatar

The game.ReplicatedStorage.ExclusiveTrolls on both tool and ServerScriptService scripts are simply just a folder containing all the exclusive trolls, the main morph folder Is simply called:

"Morphs"

Script (ServerScriptService, Server-Side):

local CharacterFolder = game.ReplicatedStorage.ExclusiveTrolls
local store = game:GetService("DataStoreService")
local store2 = store:GetDataStore("Morph")

function save(p,val)
	store2:SetAsync(p.UserId,val)
end

game.Players.PlayerAdded:Connect(function(p)
	local val = store2:GetAsync(p.UserId) or ""

	local stringv = Instance.new("StringValue",p)
	stringv.Name = "CurrentMorph"
	stringv.Value = val
	p.CharacterAdded:Connect(function(c)
		if stringv.Value ~= "" then
			local oldchar = c
			local oldv = stringv.Value
			stringv.Value = ""
			local plrRoot = p.Character:WaitForChild("HumanoidRootPart") or p.Character.Parent:WaitForChild("Torso")

			local AveragePlayer = CharacterFolder["Sand:FB"]:Clone()
			AveragePlayer.Name = p.Name

			local rootPart = AveragePlayer:FindFirstChild("HumanoidRootPart") or AveragePlayer:FindFirstChild("Torso")

			if rootPart and plrRoot then
				rootPart.CFrame = plrRoot.CFrame
			end

			p.Character = AveragePlayer

			AveragePlayer.Parent = workspace
			AveragePlayer.Humanoid.DisplayName = "Sand:FB"
			oldchar:Destroy()
			stringv.Value = oldv
		end
	end)
end)

game.Players.PlayerRemoving:Connect(function(p)
	local stringv = p:WaitForChild("CurrentMorph")
	save(p,stringv.Value)
end)