To remove duplicate records--also called deduping--open your Zotero 6.0 desktop software.
- Click on the icon on the left named "Duplicate Items". This will display a listing of items Zotero believes to be duplicates.
- Select which version you would prefer to keep; differences will be displayed beneath the listing of the different versions.
- Once you've decided on a final version, click on the "Merge Items" button and Zotero will remove the duplicate references.