> ## 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.

# E2309

> Parquet target — File collision

`publish()` would overwrite an existing Parquet file for a block range — a sign of overlapping
segments or a dirty output directory.

**Fix** — write to a clean output directory and don't point two writers at the same one.