Can't set address columns after fitting

[amontanez24]

Environment Details

Please indicate the following details about the environment in which you found the bug:

• SDV version: address_data branch
• Python version: Any
• Operating System: Any

Error Description

If you call set_address_columns after fitting or assigning transformers, the transformers are not properly updated. Additionally, sampling will fail.

Steps to reproduce

set_1 = (
    'country of departure','region of departure',
    'region code of departure', 'city of departure',
    'postal code of departure', 'street address of departure',
    'secondary address of departure'
)
synthesizer = GaussianCopulaSynthesizer(metadata, locales=['en_US', 'es_ES'])
synthesizer.auto_assign_transformers(data)
synthesizer.get_transformers()
set_2 = (
    'country of arrival', 'region of arrival', 'region code of arrival',
    'city of arrival', 'postal code of arrival', 'street address of arrival',
    'secondary address of arrival'
)

synthesizer.set_address_columns(column_names= set_2, anonymization_level='street_address')
synthesizer.fit(data)
synthesizer.get_transformers()
synthetic_data = synthesizer.sample(len(data))