# pydantic.error_wrappers.ValidationError: 1 validation error for Model
  extra field not permitted

- **ID:** `python/pydantic-extra-fields-forbidden`
- **Domain:** python
- **Category:** data_error
- **Verification:** ai_generated
- **Fix Rate:** 80%

## Root Cause

Model is configured with extra='forbid' but receives additional fields not defined in the model.

## Version Compatibility

| Version | Status | Introduced | Deprecated |
|---------|--------|------------|------------|
| 2.x | active | — | — |

## Workarounds

1. **** (90% success)
   ```
   Set extra='ignore' to silently drop extra fields
   ```
2. **** (85% success)
   ```
   Add the extra field to model if needed
   ```

## Dead Ends

- **** — This may not be desired; better to allow or ignore. (50% fail)
- **** — Data may be lost or inconsistent. (70% fail)