1.This bug was not caused by code errors but rather by improper shutdowns of Unity, which led to incorrect storage of item information. Previously, efforts to resolve the issue involved code modifications and rewrites of item handling, which did not fix the problem. Reinitializing the items has resolved the issue.
2.This update also addresses the problem of items having incorrect levels (e.g., -5, -10).
no need to start a new game.