Why does my shop system keep purchasing even when stripebatowned is set to true?

So I'm doing a purchase system and when it's purchased it sets the variable

local batowned

too true, but when I press purchase again it purchases it despite batowned being true.

local stripebatowned = false
player = game:GetService("Players").LocalPlayer
if stripebatowned == false then
script.Parent.MouseButton1Click:Connect(function()
    if player.leaderstats.Credits.Value >= 1000 then
        script.Parent.Text = "Equip"
        local stripebatowned = true
        player.leaderstats.Credits.Value = player.leaderstats.Credits.Value - 1000
        end
    end)
end

it should only trigger if stripebatowned = false but it still triggers even when set to true so whats the issue?

When you call a function, in your case MouseButton1Click, it doesn't automatically disconnect. What is happening is, the script is checking to see if stripedbatowned == false, if so it connects the mousebutton1down. This results in the function staying connected, and being able to be fired even if stipedbatowned == true. This is because you dont check inside the function itself to see if they own it already. To solve the problem, call the MouseButton1Click function, then check to see if they own it.

local stripebatowned = false
player = game:GetService("Players").LocalPlayer
script.Parent.MouseButton1Click:Connect(function()
	if stripebatowned == false then
		if player.leaderstats.Credits.Value >= 1000 then
			script.Parent.Text = "Equip"
			local stripebatowned = true
			player.leaderstats.Credits.Value = player.leaderstats.Credits.Value - 1000
		end
	end
end)