---
source_handle: dup-key-src
fetched: 2026-06-03
source_url: https://example.com/dup
provenance: source-direct
source_handle: dup-key-src
---
# Duplicate-key
## Summary
Frontmatter declares source_handle twice — split-brain between first-wins and last-wins readers.
## Key passages
> A load-bearing quote. — §1