Could you make it 

```python
            if name in [plugins[i]['name'] for i in plugins if plugins[i]['name'] == name]:
                if name == 'admin':
                    self.critical('Plugin admin already loaded. Check you main config file')
                else:
                    self.warning('Plugin %s already loaded. Avoid multiple entries of the same plugin.' % name)
```
so it does prevent B3 from starting for the admin plugin specific case ?