The throwable knife model I'm using completely breaks the game. How can I fix this?

I tried to use a throwable knife script for my game, but whenever I kill someone with it in game (or if they kill me) it only happens on my side of the game, and not theirs

ex: I kill an enemy player with the knife, and they die. But in reality nothing happened to them and they're still alive

Here is the KnifeScript

local function WaitForChild(parent, childName)
	while not parent:FindFirstChild(childName) do parent.ChildAdded:wait() end
	return parent[childName]
end


local SLASH_DAMAGE = 100
local DOWNSTAB_DAMAGE = 100
local THROWING_DAMAGE = 100
local HOLD_TO_THROW_TIME = 0.38


local Damage = 100

local MyHumanoid = nil
local MyTorso = nil
local MyCharacter = nil
local MyPlayer = nil

local Tool = script.Parent
local Handle = WaitForChild(Tool, 'Handle')

local BlowConnection
local Button1DownConnection
local Button1UpConnection

local PlayStabPunch
local PlayDownStab
local PlayThrow
local PlayThrowCharge

local IconUrl = Tool.TextureId  -- URL to the weapon knife icon asset

local DebrisService = game:GetService('Debris')
local PlayersService = game:GetService('Players')

local SlashSound

local HitPlayers = {}

local LeftButtonDownTime = nil

local Attacking = false

function Blow(hit)
	if Attacking then
		BlowDamage(hit, Damage)
	end
end

function BlowDamage(hit, damage)
	local humanoid = hit.Parent:FindFirstChild('Humanoid')
	local player = PlayersService:GetPlayerFromCharacter(hit.Parent)
	if humanoid ~= nil and MyHumanoid ~= nil and humanoid ~= MyHumanoid then
		if not MyPlayer.Neutral then 		
			-- Ignore teammates hit
			if player and player ~= MyPlayer and player.TeamColor == MyPlayer.TeamColor then
				return
			end
		end
		-- final check, make sure weapon is in-hand
		local rightArm = MyCharacter:FindFirstChild('Right Arm')
		if (rightArm ~= nil) then
			-- Check if the weld exists between the hand and the weapon
			local joint = rightArm:FindFirstChild('RightGrip')
			if (joint ~= nil and (joint.Part0 == Handle or joint.Part1 == Handle)) then
				-- Make sure you only hit them once per swing
					TagHumanoid(humanoid, MyPlayer)
					print("Sending " .. damage)				
					
					local checksound = humanoid.Parent:findFirstChild("Sound")
					if checksound == nil then
					local givesound = script.Parent.Sound:clone()
					givesound.Parent = humanoid.Parent
					givesound.Disabled = false
					else
					checksound:remove()
					local givesound = script.Parent.Sound:clone()
					givesound.Parent = humanoid.Parent
					givesound.Disabled = false
					end
					wait()
					humanoid:TakeDamage(humanoid.MaxHealth)
					if humanoid.Health == math.huge or humanoid.MaxHealth == math.huge then
						humanoid.Parent:BreakJoints()
					end
				end
		end
	end
end

function TagHumanoid(humanoid, player)
	-- Add more tags here to customize what tags are available.
	while humanoid:FindFirstChild('creator') do
		humanoid:FindFirstChild('creator'):Destroy()
	end 

	local creatorTag = Instance.new('ObjectValue')
	creatorTag.Value = player
	creatorTag.Name = 'creator'
	creatorTag.Parent = humanoid
	DebrisService:AddItem(creatorTag, 1.5)

	local weaponIconTag = Instance.new('StringValue')
	weaponIconTag.Value = IconUrl
	weaponIconTag.Name = 'icon'
	weaponIconTag.Parent = creatorTag
	DebrisService:AddItem(weaponIconTag, 1.5)
end

function HardAttack()
	Damage = SLASH_DAMAGE
	HitSound:play()
	if PlayStabPunch then
		PlayStabPunch.Value = true
		wait(1.0)
		PlayStabPunch.Value = false
	end
end

function NormalAttack()
	Damage = DOWNSTAB_DAMAGE
	KnifeDown()
	HitSound:play()
	if PlayDownStab then
		PlayDownStab.Value = true
		wait(1.0)
		PlayDownStab.Value = false
	end
	KnifeUp()
end

function ThrowAttack()
	KnifeOut()
	if PlayThrow then
		PlayThrow.Value = true
		wait()
		if not Handle then return end
		local throwingHandle = Handle:Clone()
		DebrisService:AddItem(throwingHandle, 5)
		throwingHandle.Parent = game.Workspace
		if MyCharacter and MyHumanoid then
			throwingHandle.Velocity = (MyHumanoid.TargetPoint - throwingHandle.CFrame.p).unit * 100
			-- set the orientation to the direction it is being thrown in
			throwingHandle.CFrame = CFrame.new(throwingHandle.CFrame.p, throwingHandle.CFrame.p + throwingHandle.Velocity) * CFrame.Angles(0, 0, math.rad(-90))
			local floatingForce = Instance.new('BodyForce', throwingHandle)
			floatingForce.force = Vector3.new(0, 196.2 * throwingHandle:GetMass() * 0.98, 0)
			local spin = Instance.new('BodyAngularVelocity', throwingHandle)
			spin.angularvelocity = throwingHandle.CFrame:vectorToWorldSpace(Vector3.new(0, -400, 0))
		end
		Handle.Transparency = 1
		-- Wait so that the knife has left the thrower's general area
		wait()
		if throwingHandle then
			local Throwevent = script.Parent.ThrowHandleHitWeld:Clone()
			Throwevent.Parent = throwingHandle
			Throwevent.Disabled = false
			local touchedConn = throwingHandle.Touched:connect(function(hit) print("hit throw") BlowDamage(hit, THROWING_DAMAGE) end)
		end
		-- must check if it still exists since we waited
		if throwingHandle then
			throwingHandle.CanCollide = true
		end
		wait(0.6)
		if Handle and PlayThrow then
			Handle.Transparency = 0
			PlayThrow.Value = false
		end
	end
	KnifeUp()
end

function KnifeUp()
	Tool.GripForward = Vector3.new(0,0,-1)
	Tool.GripRight = Vector3.new(1,0,0)
	Tool.GripUp = Vector3.new(0,1,0)
end

function KnifeDown()
	Tool.GripForward = Vector3.new(0,0,-1)
	Tool.GripRight = Vector3.new(1,0,0)
	Tool.GripUp = Vector3.new(0,-1,0)
end

function KnifeOut()
	Tool.GripForward = Vector3.new(0,0,-1)
	Tool.GripRight = Vector3.new(1,0,0)
	Tool.GripUp = Vector3.new(0,1,0)
end

Tool.Enabled = true

function OnLeftButtonDown()
	LeftButtonDownTime = time()
	if PlayThrowCharge then
		PlayThrowCharge.Value = true
	end
end

function OnLeftButtonUp()
	if not Tool.Enabled then return end
	-- Reset the list of hit players every time we start a new attack
	HitPlayers = {}
	if PlayThrowCharge then
		PlayThrowCharge.Value = false
	end
	if Tool.Enabled and MyHumanoid and MyHumanoid.Health > 0 then
		Tool.Enabled = false
		local currTime = time()
		if LeftButtonDownTime and currTime - LeftButtonDownTime > HOLD_TO_THROW_TIME and
			currTime - LeftButtonDownTime < 1.15 then
			ThrowAttack()
		else
			Attacking = true
			if math.random(1, 2) == 1 then
				HardAttack()
			else
				NormalAttack()
			end
			Attacking = false
		end
		Tool.Enabled = true
	end
end

function OnEquipped(mouse)
	PlayStabPunch = WaitForChild(Tool, 'PlayStabPunch')
	PlayDownStab = WaitForChild(Tool, 'PlayDownStab')
	PlayThrow = WaitForChild(Tool, 'PlayThrow')
	PlayThrowCharge = WaitForChild(Tool, 'PlayThrowCharge')
 	SlashSound = WaitForChild(Handle, 'Swoosh1')
	HitSound = WaitForChild(Handle, 'Ting')
	SlashSound:play()
	BlowConnection = Handle.Touched:connect(Blow)
	MyCharacter = Tool.Parent
	MyTorso = MyCharacter:FindFirstChild('Torso')
	MyHumanoid = MyCharacter:FindFirstChild('Humanoid')
	MyPlayer = PlayersService.LocalPlayer
	if mouse then
		Button1DownConnection = mouse.Button1Down:connect(OnLeftButtonDown)
		Button1UpConnection = mouse.Button1Up:connect(OnLeftButtonUp)
	end
	KnifeUp()
end

function OnUnequipped()
	-- Unequip logic here
	if BlowConnection then
		BlowConnection:disconnect()
		BlowConnection = nil
	end
	if Button1DownConnection then
		Button1DownConnection:disconnect()
		Button1DownConnection = nil
	end
	if Button1UpConnection then
		Button1UpConnection:disconnect()
		Button1UpConnection = nil
	end
	MyHumanoid = nil
end


Tool.Equipped:connect(OnEquipped)
Tool.Unequipped:connect(OnUnequipped)