# conflict

> The resource changed after you read it (its `version` or `updatedAt` moved), so the write was refused.

**Changed since you read it** · HTTP 409

## What it means

The resource changed after you read it (its `version` or `updatedAt` moved), so the write was refused.

## What to do

Read it again, re-apply your change to the fresh copy, and retry.

## Example

```json
{
  "type": "https://api.bymundi.com/problems/conflict",
  "title": "Changed since you read it",
  "status": 409,
  "detail": "The resource changed after you read it (its `version` or `updatedAt` moved), so the write was refused.",
  "code": "conflict",
  "requestId": "req_…"
}
```

How to read any error: [Errors guide](https://api.bymundi.com/docs/guides/errors.md).