> ## Documentation Index
> Fetch the complete documentation index at: https://docs.sqd.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# E2307

> Parquet target — Unsupported column type

A column declared a type the target doesn't support.

**Fix** — use a supported leaf type, or `LIST` / `STRUCT` (the message lists the supported set).