Also, pay attention to how a model is built with dbt_utils.unpivot macro:
{{ dbt_utils.unpivot(
relation=ref('dim_chauffeurs_labels'),
cast_to='varchar',
exclude=['actual_dt', 'chauffeur_id'],
field_name='label',
value_name='value'
) }}
A list of attributes unloaded could be expanded or narrowed without actual code changes. Schema is ['actual_dt', 'chauffeur_id', 'label', 'value']