You don't need to solve it now, because when you graduate, the school will let you go to various places to stamp before issuing your diploma. For example, if you owe tuition, they won't stamp it until you make up the tuition. There is also a stamp in the library. If you borrow a book, you can't return it. You can also stamp in the infirmary to see if there is any arrears.

So, you don't have to think first. If there is indeed a record of non-return, it will be fine!