' FilterDescendantsInstances cannot be assigned to ' Error

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#1

So I was copying a script @Alvin_Blox made ( Again ) but this error pops up: ’ FilterDescendantsInstances cannot be assigned to ’

script.Parent:WaitForChild('Fire').OnServerEvent:Connect(function(player, mouse)
	local ray = Ray.new()
	
	ray.FilterDescendantsInstances = {player.Character}
	ray.FilterType = Enum.RaycastFilterType.Blacklist
	
	local raycastResult = workspace:Raycast(script.Parent:FindFirstChild('Handle'), (mouse - script.Parent:FindFirstChild('Handle').Position)*300, ray)
	
	if raycastResult then
		local hit = raycastResult.Instance
		local model = hit:FindFirstAncestorOfClass('Model')
		
		if model then
			if model:FindFirstChild('Humanoid') then
				model:FindFirstChild('Humanoid').Health -= 30
			end
		end
	end
end)
#2

Use RaycastParams.new() instead of Ray.new()

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