Library showing pack not used (not a swatch problem)

An NPC was generated, which I liked, so I decided to just change the clothes and upload him into the gallery so my friends can also use it. I just change the clothes so that they are all base game. But after I uploaded it into the library, the icon of Snowy Escape appeared, showing that this sim was using some items from the pack (a kimono and geta). I am sure I am not using these items, the sim has only one outfit per category.