Every task-tracking system ought to auto-expire older tasks by default.
We’ve developed exocortices that make it too easy to preserve and maintain open loops. Our brains used to release those all on their own, but now our systems clog up with tasks like artery plaque. How close are you to a mental heart attack?
If that older task was so important, you would have tackled it by now. And if it wasn’t that important, why keep it around? Let it go. Close that open loop. For your own sake and for the sake of your loved ones.