# `PUT /article/{sku}/eans`

Protected. Requires a valid session cookie (`credentials: 'include'`).

Replace article EANs by SKU

Replace-all EANs for the article. EANs must be non-empty unique strings;
empty array clears all EANs. Returns the same shape as GET by SKU.


## Path parameters

| Param | Required | Type | Description |
|-------|----------|------|-------------|
| `sku` | yes | string |  |

## Body (JSON)

| Field | Required | Type | Description |
|-------|----------|------|-------------|
| `eans` | yes | string[] |  |

```json
{
  "eans": [
    "4001234567890"
  ]
}
```

## Signals

On success, emits SSE signal: `article-<sku>` (see [`GET /events`](../events.md)).

## Response `204`

Updated

_No content_

## Errors

| Status | Description |
|--------|-------------|
| 400 | Invalid eans — `{"error":"…"}` |
| 401 | Unauthorized — `{"error":"…"}` |
| 403 | Not authorized — `{"error":"…"}` |
| 404 | Article not found — `{"error":"…"}` |
| 409 | EAN already in use — `{"error":"…"}` |

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