ᐅ Experience with damp back walls on Kallax units in basement rooms?

Hello everyone, I have a rather specific question: I have a Kallax shelf from IKEA in my basement, which I use for storing various items like tools and boxes. Unfortunately, I have noticed that the back panels of the shelf have become damp in some areas, probably due to the generally high humidity in the basement and possibly some moisture coming through the wall behind it.

My question is: Has anyone experienced damp back panels on a Kallax shelf in basement environments? How did you solve or prevent this issue? Have these moisture damages affected the stability or material of the shelf in the long term? And what practical measures can be taken to keep the back panel dry without having to remove the shelf completely from the basement?

I would appreciate any helpful suggestions or experiences specifically related to this combination of damp basements and Kallax back panels. Thanks in advance!