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Posted to notifications@superset.apache.org by "dosubot[bot] (via GitHub)" <gi...@apache.org> on 2026/05/02 03:23:38 UTC
Re: [D] Error when trying to upload a CSV file [superset]
GitHub user dosubot[bot] edited a comment on the discussion: Error when trying to upload a CSV file
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Hi @Manjavachi! I'm [Dosu](https://go.dosu.dev/dosubot) and I’m helping the superset team.
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This error isn't caused by the official Superset codebase—Superset's CSV upload logic does not use or pass the mangle_dupe_cols parameter to pandas.read_csv, and only allows a specific set of parameters through a strict schema. This means the error is likely coming from a custom plugin, API client, or local modification that is injecting this parameter, or possibly from an automated script or tool interacting with the Superset API using legacy code.
I recommend checking for any customizations or third-party tools in your environment that might be sending mangle_dupe_cols, and also verifying that both your Superset and pandas versions are up to date and compatible. If you share your Superset and pandas versions, I can help check for any known compatibility issues. For reference, you can see how Superset handles CSV uploads in its code here: [CSV upload implementation](https://github.com/apache/superset/blob/f6f95821863536654c73553db02cdd03827c8113/superset/commands/database/uploaders/csv_reader.py).
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GitHub link: https://github.com/apache/superset/discussions/33885#discussioncomment-13564060
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