Gamepass script allows player to purchase gamepass despite player already owning gamepass?

I have a gamepass script that fires an event when a part is touched. This event prompts a gamepass to the player that gives extra walkspeed to the player if they buy it. However, when I run my game in Roblox Studio, buy the gamepass, and reset my character, my character no longer has extra walkspeed and the player can buy the gamepass again. Even if I do not reset my character, the gamepass can be bought again.

There was no error in the output window and I've attempted to debug this issue by putting print statements, however, I failed to find any possible code that could've caused this.

Here are my scripts:

DetectGamepassRequest (Located in ServerScriptService) (Script):

> local part = workspace.Part
> local Players = game:GetService("Players")
> local MarketplaceService = game:GetService("MarketplaceService")
> local gamepassId = 74392253
> local ReplicatedStorage = game:GetService("ReplicatedStorage")
> local GamepassEvent = ReplicatedStorage:WaitForChild("GamepassEvent")
> 
> part.Touched:Connect(function(otherPart)
> 	print("1")
> 	local humanoidCheck = otherPart.Parent:FindFirstChildOfClass("Humanoid")
> 	local player = Players:GetPlayerFromCharacter(otherPart.Parent)
> 	
> 	if humanoidCheck and player then
> 		print("2")
> 		GamepassEvent:FireClient(player)
> 	end
> end)
> 
> GamepassEvent.OnServerEvent:Connect(function(player)
> 	print("3")
> 	local character = game.Workspace:FindFirstChild(player.Name)
> 	character.Humanoid.WalkSpeed *= 2
> end)

GamepassHandler (Located in StarterPlayerScripts) (LocalScript):

> local Players = game:GetService("Players")
> local MarketplaceService = game:GetService("MarketplaceService")
> local gamepassId = 74392253
> local ReplicatedStorage = game:GetService("ReplicatedStorage")
> local GamepassEvent = ReplicatedStorage:WaitForChild("GamepassEvent")
> local player = Players.LocalPlayer
> 
> GamepassEvent.OnClientEvent:Connect(function()
> 	print("4")
> 	local playerUserID = player.UserId
> 	local hasPass = false
> 	
> 	local success, errorMessage = pcall(function()
> 		hasPass = MarketplaceService:UserOwnsGamePassAsync(playerUserID, gamepassId)
> 	end)
> 	
> 	if hasPass then
> 		print("5")
> 		print("Player already owns the gamepass!")
> 	else
> 		print("6")
> 		MarketplaceService:PromptGamePassPurchase(player, gamepassId)
> 	end
> 	
> 	if not success then
> 		print("7")
> 		warn("Something went wrong when checking if user "..player.Name.." has the gamepass! "..errorMessage)
> 	end
> end)
> 
> MarketplaceService.PromptGamePassPurchaseFinished:Connect(function(playerWhoPurchased, soldGamePassId, wasPurchaseSuccessful)
> 	print("8")
> 	if soldGamePassId == gamepassId and wasPurchaseSuccessful then
> 		print("9")
> 		GamepassEvent:FireServer()
> 	end
> end)

GamepassPerksHandler (Located in ServerScriptService) (Script):

> local Players = game:GetService("Players")
> local MarketplaceService = game:GetService("MarketplaceService")
> local walkSpeedId = 74392253
> 
> 
> Players.PlayerAdded:Connect(function(player)
> 	print("10")
> 	player.CharacterAdded:Connect(function(character)
> 		print("11")
> 		local hasPass = false
> 		local playerUserId = player.UserId
> 		
> 		local success, errorMessage = pcall(function()
> 			hasPass = MarketplaceService:UserOwnsGamePassAsync(playerUserId, walkSpeedId)
> 		end)
> 		
> 		if hasPass then
> 			print("12")
> 			character.Humanoid.WalkSpeed *= 2
> 		elseif character.Humanoid.WalkSpeed > 16 and not hasPass then
> 			print("13")
> 			player:Kick("Please stop exploiting the 2x speed gamepass! Reason: Hacking") -- anti cheat (optional)
> 		end
> 	end)
> end)
> 

As always, thank you for your time and I appreciate any help anyone gives me!

well if you want something that can be bought multiple time

you need a developer product not a gamepass