The stairs are a bit loose and need to be repaired before you can go to the second floor. You can repair them once per day, and each repair is quite taxing on your Stamina. The stairs need to be repaired 3 times.

You remember this staircase, and you know exactly which step gives under your weight. Nail it down while you still have the strength; the sooner the second floor is usable, the easier you will rest. You can repair it once per day, and it needs 3 repairs.