everyone's data saves the same value among other issues?

--set core values and load data-----
local plr = game.Players:FindFirstChild(script.Parent.Name)
repeat wait() until plr


local datastore = game:GetService("DataStoreService")
	local mydata = datastore:GetDataStore("mydata")
local value = script.Parent.Gems
local data
	local success, fail = pcall(function()
		data = mydata:GetAsync(plr.UserId.."Gems")
	end)
	if success then
		value.Value = data
	else
		print("data load failed")
		warn(fail)
	end
----------------------------------


--save data--
local debounce = false

game.Players.PlayerRemoving:Connect(function(plr)
	
	local success, fail = pcall(function()
		mydata:SetAsync(plr.UserId.."Gems",value.Value)
	end)
	if success then
		print("data saved")
		script.Parent:Destroy()
	else
		print("an error has occured while saving")
		warn(fail)
	end
end)


local changedebounce = false
local char = plr.Character
char.Humanoid.Died:Connect(function()
	if not changedebounce then
		changedebounce = true
		
		local success, fail = pcall(function()
		mydata:SetAsync(plr.UserId.."Gems",value.Value)
	end)
	if success then
		print("data saved")
		script.Parent:Destroy()
	else
		print("an error has occured while saving")
		warn(fail)
	end
	end
	wait(2)
	
end)
-----------------

	
	
	

this is my datastore for saving gems but I ran into issues. one of them is that everyone keeps saving the same value, so if one person has 100 gems then another person who loads their data now has 100 gems. im not sure what is going on as it should be saving data with a player's playerID.

some help with this and any other issues would be GREATLY appreciated.