I have made a job system, but I get an issue. How can I fix this?

So I made a job system, where you get a mop and have to touch dirt parts. I have also made it that the dirt parts respawn after a while. The problem is that only one person can work at a time. I mean the first person that joined, only he can work. I don't know how to fix this.

I have a folder in workspace and in them are all the dirt parts. In the parts are some scripts. This is the code:

local TweenService = game:GetService("TweenService")
local spill = script.Parent

local goal = {}
goal.Size= spill.Size - Vector3.new(0,5,5)

local tweenInfo = TweenInfo.new(6)

local tween = TweenService:Create(spill,tweenInfo, goal)

local activated = false

game.Players.PlayerAdded:Connect(function(plr)
    plr.CharacterAdded:Connect(function(chr)
        local humanoid = chr:WaitForChild("Humanoid")

        spill.Touched:Connect(function(hit)
            if hit.Parent.Name == "Mop" then
                if activated == false then
                    activated = true
                    if spill.Transparency == 0 then
                        tween:Play()

                        humanoid.WalkSpeed = 0
                        wait(6.5)
                        humanoid.WalkSpeed = 16                     
                        spill.Transparency = 1
                        spill.Size = Vector3.new(0.128, 3.85, 4.85)
                        plr.leaderstats.Salary.Value += math.random(1,5)
                    end
                    activated = false
                end
            end
        end)
    end)
end)

I made a part if you touch it then you get the money.

game.Players.PlayerAdded:Connect(function(plr)

script.Parent.Touched:Connect(function()
        local Tool = plr.Backpack:FindFirstChild("Mop")  or plr.Character:FindFirstChild("Mop")

        plr.leaderstats.Cash.Value = plr.leaderstats.Cash.Value + plr.leaderstats.Salary.Value
        plr.leaderstats.Salary.Value = 0

        if Tool then
            print("Player is holding a mop")
            Tool:Destroy()
        end
    end)
end)

I also made a dialogue so you can talk to a person. Then he gives you.

I have a folder in ReplicatedStorage and in the folder are two RemoteEvents called DialogueVisibleEvent and ToolGiverEvent. I also have the mop tool in ReplicatedStorage

In ServerScriptService, I have three scripts, A leaderstats, a script that makes the dirt parts respawn and a script that gives the player a mop.

This is the dirt part respawn script:

local spills = game.Workspace.Spills:GetChildren()

while true do
    wait(math.random(3,5))
    local randomSpill = spills[math.random(1, #spills)]
    randomSpill.Transparency = 0
end

And lastly the tool giver script

local mopEvent = game.ReplicatedStorage.Events.ToolGiverEvent

    mopEvent.OnServerEvent:Connect(function(plr, tool)
    local toolClone = tool:Clone()
    toolClone.Parent = plr.Backpack
end)

Where in the script did I write wrong? How can I make it so that more players can work? I appreciate if you help me :)