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?