# django.core.exceptions.ImproperlyConfigured: Model backends are not supported by this authentication backend.

- **ID:** `python/django-auth-backend-error`
- **Domain:** python
- **Category:** auth_error
- **Verification:** ai_generated
- **Fix Rate:** 80%

## Root Cause

A custom authentication backend is misconfigured or using wrong base class.

## Version Compatibility

| Version | Status | Introduced | Deprecated |
|---------|--------|------------|------------|
| 3.x | active | — | — |

## Workarounds

1. **** (85% success)
   ```
   Correctly subclass BaseBackend and implement authenticate() and get_user() methods.
   ```

## Dead Ends

- **** — Loses custom authentication logic. (50% fail)
- **** — If custom backend is needed, this removes functionality. (60% fail)