azure devops work item duplicates when inserting csv

Hi, this usually happens when Azure DevOps treats each CSV row as a new work item instead of an update to an existing one. If you are importing into another project or board, make sure the CSV does not accidentally contain repeated rows, and be very careful with the ID field because work item IDs are not portable between projects. For migrations, I’d use the Azure DevOps Migration Tools or REST API instead of CSV if you need to preserve hierarchy and avoid duplicates. CSV import is okay for simple new items, but it is not great for full board migration.