def METHOD_NAME(self):
    # Given
    self.assertTrue(self.has_column(self.get_table(CBSDS_TABLE), CBSDS_CHANNELS_COLUMN))
    with self.assertRaises(NoSuchTableError):
        self.get_table(CHANNELS_TABLE)
    # When
    self.downgrade()
    # Then
    self.assertFalse(self.has_column(self.get_table(CBSDS_TABLE), CBSDS_CHANNELS_COLUMN))
    channels = self.get_table(CHANNELS_TABLE)
    self.has_columns(
        channels,
        ['id', 'cbsd_id', 'low_frequency', 'high_frequency', 'max_eirp', 'channel_type', 'rule_applied'],
    )