I just have a question on radd al mudalim. I have recently discovered that I had to pay radd al mudalim because I borrowed a book from somebody but did not return it and now the person is impossible to find.

I just have a question – I went to hajj a few years ago and I didn’t know about this concept of radd al mudalim. Does this act of "not returning a book" to its owner affect the validity of my hajj? As mentioned I only recently found out about this concept.