Decal changing script doesn't work, for some reason?

Server Script:

remote.OnServerEvent:Connect(function(player,data)
	if data and data["P"] then
		if data.P == "ChangeID" then
			local part = data["Part"]
			if part then
				for i,v in pairs(part:GetChildren()) do
					if v:IsA('Decal') then
						v.Texture = ""
						v.Texture = "rbxassetid://"..tostring(data["ID"])
					end
				end
			end
end
end
end)

local script:

script.Parent:WaitForChild('TextButton').MouseButton1Click:Connect(function()
	game.ReplicatedStorage.MasterRemote:FireServer({["P"]="ChangeID",["ID"]=script.Parent.TextButton.Text,["Part"]=game.Players.LocalPlayer.Character.ProtestFlag.flagpart})
end)

It does change the decal id, it just makes the decal go white. I tried both ways, just putting the ID, and I also tried doing the -1 on the decal ID until the decal image showed up on the web. Nonetheless, both ways make the decal go white.

This is actually Roblox's fault. They have implemented a stupid way to handle these things. You have to provide the texture id of the decal that you want to change and not the asset id. (Could be other way around).