Unable to cast Instance to bool? error

Hello i am trying to make a ray but in line 7 an error occurs

Script:

local part = script.Parent
local Lazar = game.ReplicatedStorage.Lazar

local myFirstRay = Ray.new(part.Position, Vector3.new(0,0, -1024))

while wait() do
	local hit, position = game.Workspace:FindPartOnRayWithIgnoreList(myFirstRay, part, Lazar)
	
	local Lazar = script.Parent
	local Part = game.Workspace.TwistedPandora.Part

	local X = Part.Position.X
	local Y = Part.Position.Y
	local Z = Part.Position.Z + -512

	Lazar.Position = Vector3.new(X,Y,Z)
	
	if hit then
		print("Ray intersected with another part!")
		if hit.Parent:FindFirstChild("Humanoid") then
			hit.Parent.Humanoid.Health = 0
		elseif hit.Parent.Parent:FindFirstChild("Humanoid") then
			hit.Parent.Parent.Humanoid.Health = 0
		else
			hit:Destroy()
		end
	end
end