Upgrade StorageMoving unattached notes to a new item
I accidentally entered a new copy of an item, and I didn't discover that until after I had reformatted and corrected the title and editors in the new item. The previous item had notes attached to it, and I got the bright idea of selecting those notes and dragging and dropping them onto the new item. Either that doesn't work or I missed, and now I have nine lengthy notes sitting by themselves in Unfiled Items. Can I attach those to a new item?
When you originally dragged and dropped, you likely missed the target item and dropped in between two items, which makes these notes standalone. You could also have used the merge duplicate feature. Duplicate items show up in the "Duplicate Items" folder.
https://www.zotero.org/support/duplicate_detection