AttributeError: 'DetectionModel' object has no attribute 'yaml'

This error indicates that you are trying to access an attribute called `yaml` on an object of the `DetectionModel` class, but that attribute does not exist for that object.

There are a few possible reasons for this error:

1. You may have misspelled the attribute name. Double-check the spelling of the attribute you are trying to access.

2. The `yaml` attribute may not be defined for the `DetectionModel` class. Check the documentation for the `DetectionModel` class to see what attributes are available.

3. The `yaml` attribute may be defined for a subclass of `DetectionModel`, but not for the `DetectionModel` class itself. Make sure you are using the correct subclass of `DetectionModel`.

To fix this error, you will need to identify the correct attribute to use or modify your code to create or access the correct attribute.