My game cannot register killer too many creator tags?

I have a game with sword that should register if you kill someone. The problem is when i hit other player he gets like 4 creator tags. Wich propably prevents to register killer. I have this code in my weapon and other in leaderstats

WEAPON SCRIPT

--damage
hitbox.Touched:Connect(function(Hit)
    if Hit.Parent:FindFirstChild("Humanoid") and Hit.Parent ~= tool.Parent then
        if debounce == true then

            --Check to make sure it's a player
            local plr = game.Players:GetPlayerFromCharacter(Hit.Parent)
            if plr then
                --Create the tag, place it in their Humanoid
                local tag = Instance.new('ObjectValue',Hit.Parent.Humanoid)
                tag.Name = 'creator'
                --Make the value your player instance
                tag.Value = plr
                --To be fair, make the tag expire.. so someone that you hit 10 minutes ago doesn't reward you a KO
                wait(3)
                tag:Destroy()
            end
            Hit.Parent:FindFirstChild("Humanoid"):TakeDamage(3)

LEADERSTATS

p.CharacterAdded:Connect(function(c)

        c:WaitForChild("Humanoid").Died:Connect(function()
            local creator = c.Humanoid:FindFirstChild('creator')

            if creator ~= nil and creator.Value ~= nil then
                print("killer detected!")

            else
                print("CANNOT FIND KILLER!")
            end