Resolved Duplicate Columns Issue in CSV Import Mapping (Upsert)

We’ve fixed an issue where duplicate fields appeared in the mapping stage during CSV imports when applying a saved mapping. In some cases, fields such as Name, Stage, and related fields were shown multiple times, requiring users to manually remove duplicates before proceeding. This update ensures that each field appears only once when a saved mapping is applied, making the import process smoother, faster, and more reliable.