item that has style_id is not zero, but only one item exists

[LeCongThuong]

Thank for sharing your great work!
I have a question.
I have tried to create directories that in this every directory, it contains items with same style_id != 0 and same pair_id.
After reading your readme.md, I understand that there are more than one items with same style_id != 0 and same pair_id.
But I saw that lots of items that have style_id != 0 but not exist correspond items
Ex: file 50299.json, item1, style_id = 14
Is there something wrong with my code?