The easiest failure to repair is often the one that has not happened yet.

Repairing something before it breaks means dealing with it under good conditions: no urgency, no consequential damage, no scramble, and full choice about how to do it. Every one of those advantages disappears at the moment of failure. The same work becomes several times harder purely because of when it is done.

Pick one likely future failure and address it while it is still hypothetical. The work is the same and the circumstances are much better.