How do you fix this error RightHand is not a valid member of Model?

So I am trying to make a punch script I have one in serverscriptserver and anther in something else.. The error im geting is: RightHand is not a valid member of Model. My code is:

math.randomseed(tick())
local ReplicatedStorage = game:GetService("ReplicatedStorage")
local punchEvent = Instance.new("RemoteEvent", ReplicatedStorage)
punchEvent.Name = "PunchEvent"

local animations = {1594228609} --Custom Animations Here Or To Add Animation make {Your Id Here, Your Id Here}

local function onPunchFired(plr)
    local char = game.Workspace:FindFirstChild(plr.Name)
    local humanoid = char.Humanoid
    local animation = Instance.new("Animation")
    local picked = math.random(1, #animations)
    animation.AnimationId = "http://roblox.com/asset/?id="..animations[picked]
    local animTrack = humanoid:LoadAnimation(animation)
    animTrack:Play()
    local dmgScript = script.DmgScript:Clone()
    if picked == 1 then
        dmgScript.Parent = char.RightHand
    elseif picked == 2 then
        dmgScript.Parent = char.LeftHand
    end
    dmgScript.Disabled = false
    wait(0.4)
    dmgScript:Destroy()
end

punchEvent.OnServerEvent:Connect(onPunchFired)
---------------

If you know how to fix it please reply, thanks.