How do i make it so the animation stops restarting?

Humanoid.Running:connect(function(speed)
			if speed >= 5 and speed <= 17 then
				print("Running")
				walk:Play()
			else 
				walk:Stop()
				print('stopped Running') 
			end

so this is the script and when im running in game with shiftlock on and when im pressing W + A or S or D it registers as another running making the animation restart, how do i fix this?