> ## 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.

# E0001

> Pipe configuration — Pipe requires a unique id

A pipe was connected to a target (`.pipeTo(...)`) while still using the default id. Targets persist
their resume cursor under the pipe's `id`, so a shared/default id would let two pipes silently
overwrite each other's progress.

**Fix** — set a stable, globally unique, non-empty `id`:

```ts theme={"system"}
evmPortalStream({ id: 'eth-transfers', portal: '...', outputs })
```