why is the parent feature locked?

local Dweapon = game:GetService("ReplicatedStorage").Dagger
local Dclone = Dweapon:Clone()
local TSweapon = game:GetService("ReplicatedStorage").TrainingSword
local TSclone = TSweapon:Clone()





game.Players.PlayerAdded:connect(function(player)
    player.CharacterAdded:connect(function(character)
local D = player:WaitForChild("StarterGear"):FindFirstChild("Dagger")   
local TS = player:WaitForChild("StarterGear"):FindFirstChild("TrainingSword")
    if D then 
        D:Destroy()
        wait(10)
        Dclone.Parent = player.StarterGear
    end
    if TS then
        TS:Destroy()
        wait(10)
        TSclone.Parent = player.StarterGear
    end
end)
end)

Error The Parent property of Dagger is locked, current parent: NULL, new parent StarterGear