Zotero9 non-duplicates problem regression

danielborek · March 22, 2026

When I am on Zotero 9.0-beta.14+8af91b014, the items that were marked as non-duplicates (like a presentation and an article with the same name and authors) appear now again as duplicates; switching back to Zotero 8, the pane is empty again (again switching back to Z9 and they appear as duplicates).

adamsmith · March 22, 2026

Zotero doesn't have a mark as non-duplicate function; if you had that, it was a plugin (Zoplicate, likely) and you'd have to contact the developer

poettli · March 23, 2026

https://github.com/ChenglongMa/zoplicate/issues/192

drjsilverman · 2026-04-27T21:05:47+00:00

I came to request this as a feature and came across this earlier comment. There are some legitimate cases where two references have the same DOI (two abstracts from the same journal supplemental issue for a conference, for example). There should be a way to tell Zotero that even though the DOIs for these 2 items match, they are actually different based on author/title, etc. Otherwise they're stuck in the duplicate list forever …

danielborek · 2026-04-28T19:32:36+00:00

@drjsilverman zooplicate plugin solves it, and it has been updated to work with zotero 9 now

drjsilverman · 2026-04-28T20:21:24+00:00

Thanks. I've installed this, and it definitely works. It would be great to have some degree of user input/correction built into the core duplicate-checking functionality, but the plugin works well for now.