How to handle the repetition of multiple documents in Mendeley?

Mendeley can effectively manage and remove duplicate documents imported from multiple sources. The software detects duplicates and enables their automated merging within its library management system. Mendeley identifies duplicates primarily through metadata similarity assessment, specifically examining DOI, PMID, title, author, and year fields. Users initiate merging using the "Tools" > "Check for Duplicates" function. During merging, Mendeley consolidates supplementary information (annotations, keywords, file attachments) from both records into the preferred version, preserving all linked data. Users should always visually inspect the grouped duplicates before confirming the merge to ensure accuracy and select the desired primary record. This functionality is integral to maintaining a clean reference library. Before merging duplicates, carefully verify each grouping and manually select the record with the most complete metadata or correct attached PDF. Merging integrates notes and files but only deletes the duplicate bibliographic entry. Regularly check for duplicates after bulk imports and maintain consistent reference import methods to minimize duplication occurrence. This process enhances organizational efficiency and prevents citation errors in bibliographies.