Disabling the Parent fires an OnTriggerExit with Children

Ok so I've got a Parent object that is scripted to disable when the player moves too far away from it. But as it is disabled Child-A seems to disappear before Child-B, causing Child-B's OnTriggerExit to fire. Now I guess this probably isn't so bad, except I keep getting the error: "Coroutine couldn't be started because the the game object 'Child-B' is inactive!"

So is there anyway to stop this? Or can I just leave the error?