exceeding maximum animation track limit?

local forward = script.Forward
local left = script.Left
local right = script.Right
local run = script.Run
local back = script.Back
local forwardvel = script.Parent.Parent.Parent.Forward
local angler = script.Parent.Parent.Parent.Turn



while true do
	wait()
	if forward.Value == true then
		run.Value = false
		back.Value = false
		--play an animation------------------------------------------------
		local controller = script.Parent.Parent.Parent.Parent.AnimationController
		local chosenanim = script.Parent.Parent.Parent.Animations.Walk
		local loaded = controller:LoadAnimation(chosenanim)
		loaded:Play()
		-------------------------------------------------------------------
		forwardvel.Velocity = script.Parent.Parent.Parent.CFrame.LookVector * 15
	elseif forward.Value == false and back.Value == false then
		--stop an animation------------------------------------------------
		local controller = script.Parent.Parent.Parent.Parent.AnimationController
		local chosenanim = script.Parent.Parent.Parent.Animations.Walk
		local loaded = controller:LoadAnimation(chosenanim)
		loaded:Stop()
		-------------------------------------------------------------------
		forwardvel.Velocity = Vector3.new(0,0,0)
	end
	
	
	
	if left.Value == true then
		right.Value = false
		--play an animation------------------------------------------------
		local controller = script.Parent.Parent.Parent.Parent.AnimationController
		local chosenanim = script.Parent.Parent.Parent.Animations.Walk
		local loaded = controller:LoadAnimation(chosenanim)
		loaded:Play()
		-------------------------------------------------------------------
		angler.AngularVelocity = Vector3.new(0,2,0)
	elseif left.Value == false and right.Value == false then
		--stop an animation------------------------------------------------
		local controller = script.Parent.Parent.Parent.Parent.AnimationController
		local chosenanim = script.Parent.Parent.Parent.Animations.Walk
		local loaded = controller:LoadAnimation(chosenanim)
		loaded:Stop()
		-------------------------------------------------------------------
		angler.AngularVelocity = Vector3.new(0,0,0)
	end
	
	
	
	if right.Value == true then
		left.Value = false
		--play an animation------------------------------------------------
		local controller = script.Parent.Parent.Parent.Parent.AnimationController
		local chosenanim = script.Parent.Parent.Parent.Animations.Walk
		local loaded = controller:LoadAnimation(chosenanim)
		loaded:Play()
		-------------------------------------------------------------------
		angler.AngularVelocity = Vector3.new(0,-2,0)
	elseif right.Value == false and left.Value == false then
		--stop an animation------------------------------------------------
		local controller = script.Parent.Parent.Parent.Parent.AnimationController
		local chosenanim = script.Parent.Parent.Parent.Animations.Walk
		local loaded = controller:LoadAnimation(chosenanim)
		loaded:Stop()
		-------------------------------------------------------------------
		angler.AngularVelocity = Vector3.new(0,0,0)
	end
	
	
	
	if run.Value == true then
		forward.Value = false
		--play an animation------------------------------------------------
		local controller = script.Parent.Parent.Parent.Parent.AnimationController
		local chosenanim2 = script.Parent.Parent.Parent.Animations.Run
		local loaded2 = controller:LoadAnimation(chosenanim2)
		loaded2:Play()
		-------------------------------------------------------------------
		forwardvel.Velocity = script.Parent.Parent.Parent.CFrame.LookVector * 30
	end
	
	
	
	if back.Value == true then
		forward.Value = false
		run.Value = false
		--play an animation------------------------------------------------
		local controller = script.Parent.Parent.Parent.Parent.AnimationController
		local chosenanim = script.Parent.Parent.Parent.Animations.Walk
		local loaded = controller:LoadAnimation(chosenanim)
		loaded:Play()
		-------------------------------------------------------------------
		forwardvel.Velocity = script.Parent.Parent.Parent.CFrame.LookVector * -5
	elseif back.Value == false and forward.Value == false then
		--stop an animation------------------------------------------------
		local controller = script.Parent.Parent.Parent.Parent.AnimationController
		local chosenanim = script.Parent.Parent.Parent.Animations.Walk
		local loaded = controller:LoadAnimation(chosenanim)
		loaded:Stop()
		-------------------------------------------------------------------
		forwardvel.Velocity = Vector3.new(0,0,0)
	end
	
	
	
end

this script manages controls for an npc, if certain values are turned on or off this script performs actions. after adding animations for the npc to use I noticed an error:“AnimationTrack limit of 256 tracks for one animator exceeded. no new tracks will be played”. what is the cause and how can I fix it?