How can I stop players from getting killed when they kill zombies?

In my game I have is so that when players touch an enemy with a humanoid part named Zombie, they will latch on to attack the zombie. This works just fine in studio, but when tested online, the player dies when the zombie does with no errors sent to the console. I also tried resetting my character while attached to a zombie a few times but nothing happened then. I think it has to do with the weld that connects the player to the zombie but I don't know why that would kill the player and not the zombie. If anyone knows how to fix this, it would be greatly appreciated. Here is the script that I made...

local grabbing = script.Parent.Latched
local character
local humanoid
local part = script.Parent.HumanoidRootPart
local UserInputService = game:GetService("UserInputService")
script.Parent.HumanoidRootPart.Touched:connect(function(hit)
	zombie = hit.Parent:findFirstChild("Zombie")
	if zombie ~=nil and zombie.Health ~= 0 and grabbing.Value == false then
		grabbing.Value = true
		print("Grab")
		part.CFrame = CFrame.new(part.Position,hit.Position)
		local CJ = CFrame.new(part.Position,hit.Position)
		local C0 = part.CFrame:inverse()*CJ
		local C1 = hit.CFrame:inverse()*CJ
		grip = Instance.new("Weld")
		grip.Name = "Latch"
		grip.C0 = C0
		grip.C1 = C1
		grip.Parent = part
		grip.Part0 = part
		grip.Part1 = hit
	end
end)


while true do
	wait(1)
	if grabbing.Value == true then
		if zombie == nil or zombie.Health == 0 or grip == nil then
			grabbing.Value = false
		end
	end
end