> ## Documentation Index > Fetch the complete documentation index at: https://docs.supportwise.app/llms.txt > Use this file to discover all available pages before exploring further. # People and import problems > Fix validation errors, unexpected updates and missing directory records. ## A CSV row is rejected Download a fresh export and compare its headers and formatting with the rejected row. Check required names, email formatting, Boolean values and the accepted working-days format. Correct the source file and preview it again. ## An existing person was duplicated An import without the exported record ID can be treated as a new row. Use **Upsert** with preserved IDs when updating exported records. Review duplicates in the directory before deleting anything. ## A synced person is missing Check the most recent LISS Sync History, then confirm the person exists in the source system with the expected identifier. A successful connection does not guarantee that every optional record was selected or suitable for import. ## A Teacher cannot access the portal Confirm the teacher is active, has a reliable email and has the expected teacher code or source match. Then verify that Teacher portal access is enabled. CSV imports add or update records; they do not bulk-delete records.