def downgrade():
# ### commands auto generated by Alembic - please adjust! ###
op.add_column('bit_facebook_daily_ad_insights', sa.Column('campaign_id', sa.VARCHAR(length=255), autoincrement=False, nullable=True))
op.add_column('bit_facebook_daily_ad_insights', sa.Column('native_id', sa.VARCHAR(length=255), autoincrement=False, nullable=True))
op.create_index('ix_bit_facebook_daily_ad_insights_native_id', 'bit_facebook_daily_ad_insights', ['native_id'], unique=True)
op.drop_column('bit_facebook_daily_ad_insights', 'date_start')
# ### end Alembic commands ###
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