When the DOI of an item already exists in Zotero
When I add an item from the web page whose DOI already exists in Zotero, can I add it again without creating a new item, but add the original item to the currently selected collection?
If there is no DOI number, it is better to add it directly and let the user handle it manually.
If there is no DOI number, it is better to add it directly and let the user handle it manually.
Keep New: Set the new item as the master item and merge the duplicates.
Keep Old: Set the existing item as the master item and merge the duplicates.
Keep All: Keep both the new item and the existing item.
Merge Manually: Go to the Duplicate Items Panel and merge the duplicate item manually.
https://chenglongma.com/zoplicate/