How can I best prevent the players data when they left interfering with their data when they rejoin?

My question is that if a player rejoins a game again right away, how can I stop that from messing up their data saving from earlier/ messing up their data loading? Here is what the playeradded event looks like:

players.PlayerAdded:Connect(function(plr)
	
	if serverStorage:FindFirstChild(plr.Name) then -- here is what I have attempted to fix what I think may be a problem because when a player leaves the players folder is not destroyed right away
		
		serverStorage:FindFirstChild(plr.Name):Destroy()
		
		wait()
		
	end

	local specialKey = "User_"..plr.UserId
	local plrName = plr.Name

	local stats = Instance.new("Folder")
	stats.Parent = plr
	stats.Name = "leaderstats"

	local cash = Instance.new("StringValue")
	cash.Parent = stats
	cash.Name = "Cash"
	
	local plrFolder = Instance.new("Folder")
	plrFolder.Parent = serverStorage
	plrFolder.Name = plr.Name	

	local plrInfo = Instance.new("Folder")
	plrInfo.Parent = plrFolder
	plrInfo.Name = "PlayerInfo"

	local money = Instance.new("NumberValue")
	money.Parent = plrInfo
	money.Name = "Money"

	local buildLevel = Instance.new("IntValue")
	buildLevel.Parent = plrInfo
	buildLevel.Name = "BuildLevel"

	local ownsTycoon = Instance.new("BoolValue")
	ownsTycoon.Parent = plrInfo
	ownsTycoon.Name = "OwnsTycoon"

	local ownedTycoon = Instance.new("StringValue")
	ownedTycoon.Parent = plrInfo
	ownedTycoon.Name = "OwnedTycoon"

	local canSave = Instance.new("BoolValue")
	canSave.Parent = plr
	canSave.Name = "CanSave"
	canSave.Value = true

end)

Here is the player removing event:

players.PlayerRemoving:Connect(function(plr)
	
	if plr.CanSave.Value then
		
		local specialKey = "User_"..plr.UserId
		local plrName = plr.Name
		local plrInfo = serverStorage:FindFirstChild(plrName):WaitForChild("PlayerInfo")
		
		if plrInfo.OwnsTycoon.Value then
			
			local tycoonName = plrInfo.OwnedTycoon.Value
			local tycoon = game.Workspace.Tycoons:FindFirstChild(tycoonName)
			local moneyToSave = plrInfo.Money.Value
			local buildLevelToSave = plrInfo.BuildLevel.Value
			local purchasedItemsTable = getTableForDataStore(tycoon, plrInfo)
			local mainTableToSave = {moneyToSave, buildLevelToSave, purchasedItemsTable}

			local success, message = pcall(function()
				
				mainDataStore:SetAsync(specialKey, mainTableToSave)
				
			end)

			tycoon:Destroy()

			local tycoonCopy = savedTycoonsTable[tycoon.Name]:Clone()
		
			tycoonCopy.Parent = game.Workspace.Tycoons
			
			local runTycoonDoor = require(moduleScripts.RunTycoonDoor)
			
			runTycoonDoor(tycoonCopy)

			if success then
				
				print(plrName.."'s data saved successfully")
				
			else
				
				print(plrName.."'s data failed to save successfully")
				
				wait(15)
				
				local maxAttemptsAllowed = 3
				local saveAttempts = 0
			
				repeat
					
					saveAttempts = saveAttempts + 1
					
					local success, message = pcall(function()
				
						mainDataStore:SetAsync(specialKey, mainTableToSave)
			
					end)
					
					if success then
						
						print(plrName.."'s data saved successfully on try "..saveAttempts)
						
					else
						
						print(plrName.."'s data failed to save successfully on try "..saveAttempts)						
						
					end

					wait(15)

				until success or saveAttempts == maxAttemptsAllowed

			end
		end	
	end
	
	wait()

	local plrFolder = serverStorage:FindFirstChild(plr.Name) 
	
	plrFolder:Destroy() -- here is where I finally get rid of it
	
end)

So how do I stop the old data from messing things up if the player rejoins the same server right away or another server right away when the data has not finished saving? By the way I do have a data saving loop. Like really. If a player rejoins another server right away even and the data did not save right away on this server then they start working on another tycoon and the data finally saves after a while I just think it could make things really bad really fast? And they wont see what their data was supposed to save last server when they join a new one immediately right? Please help!