Why does why my weld break while the player is moving?

i'm using a weld where it welds to the HumanoidRootPart only if input is detected and the problem here is that while your moving and spamming equip and unequip button, the object starts to teleport around and the weld just breaks even when you stand still it is still broken.

Equipping

--|Services|--
local replicatedStorage = game:GetService('ReplicatedStorage')

--|RemoteFunction|--
local remoteFunction = replicatedStorage.RemoteFunction

--|Weld|--
local weld = Instance.new('Weld')

--|Book|--
local openBook = replicatedStorage.CloverBookEarth

--|Book Clone|--
local bookClone = openBook:Clone()

--|Function|--
function remoteFunction:OnServerInvoke(player)
    local character = player.Character

    bookClone.Parent = workspace

    bookClone.Name = player.Name .."'s Book"

    bookClone.Spine.CFrame = character.HumanoidRootPart.CFrame * CFrame.new(-2,1,-3) * CFrame.Angles(math.rad(0),math.rad(90),math.rad(-90)) * CFrame.Angles(math.rad(-15),0,0)

    weld.Parent = bookClone.PrimaryPart

    weld.C0 = character.HumanoidRootPart.CFrame:inverse()
    weld.C1 = bookClone.Spine.CFrame:inverse()

    weld.Part0 = character.HumanoidRootPart
    weld.Part1 = bookClone.Spine
end

UnEqupping

--|Services|--
local replicatedStorage = game:GetService('ReplicatedStorage')

--|RemoteFunction|--
local remoteFunction = replicatedStorage.RemoteFunction2

--|Function|--
function remoteFunction:OnServerInvoke(player)
    local openBook = game.Workspace.CloverBookEarth

    openBook.Parent = replicatedStorage
end