list by custom numbers

I already have a collection of papers in my actual office organized by arrival time: each paper has its own number (i.e., 1, 2, 3 etc). Now I would like to add to my papers in my Zotero list those numbers, and order my Zotero papers according to those numbers. I cannot believe this is still not possible. Years ago the only software doing this to my knowledge was Endnote. Anything changed?--thanks in advance.
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