barrier to entry: no duplicate detection
I'm migrating a group of 10-15 people onto zotero and, in the process, importing a pretty redundant old system of files/folders containing PDFs. as we bring in old folders and tag them, we're discovering lots of duplicates, and one of the great things about zotero is the non-exclusivity of tags and collections, allowing one paper to live in multiple collections. the problem is that as the library grows, manually pruning duplicates becomes impossible, and more so as individual users bring in their personal collections. even the rudimentary ability to find duplicates for manual merge/deletion would be a huge help. my understanding from the 4 year old thread linked below is that such a function might be a hidden preference but i cant find it. any advice on how to activate this feature, or any info on when it might become available would be great. this is obviously a crucial feature for many.