So I thought ths 2 lines (not buttons[v]) and buttons[v] = v will stop v from getting inserted to buttons twice, but no it still does.

local buttons = { }
local num = 0
	
	
for _, v in pairs (script.Parent:GetDescendants())do
	if v:IsA("TextButton") and (not buttons[v])and v.Name == "l" or v.Name == "o" thn
		v.MouseButton1Click:Connect(function()
							
			buttons[v] = v
			print(buttons[v])
							
			v.TextColor3 = Color3.fromRGB(0,255,0)
			
				
			num = num + 1
			print(num)
			if 	num == 8 then
				print("bloxycola")
			end		
		end)
	
	end
end

How to prevent this from happening?