1054 - Unknown column 'pa.1.customers_group_id' in 'on clause'

[ERROR:] db.php (0)
[ERROR:] store-applications-core.php (0)
[ERROR:] product-specials.php (0)
[ERROR:] xoProxy.php (0)

SELECT pov.products_options_values_name, pov.products_options_values_image, pov.products_options_values_id, (SELECT COUNT(DISTINCT pa.products_id) FROM products_attributes pa USE INDEX (options_values_id), products p JOIN specials pa1 ON (p.products_id = pa1.products_id AND pa1.status = '1' AND pa.1.customers_group_id = '0' AND (pa1.specials_new_products_price < p.products_price) AND (pa1.specials_end IS NULL OR pa1.specials_end >= CURDATE()) and (pa1.specials_begin IS NULL OR pa1.specials_begin = '0000-00-00 00:00:00' or pa1.specials_begin < NOW())) WHERE p.products_id = pa.products_id AND p.products_status = '1' AND pa.options_id = o2v.products_options_id AND pa.status = '1' AND pa.options_values_id = pov.products_options_values_id AND (p.products_family = '' OR p.products_master = '0' OR p.products_master = p.products_id)) AS value_count FROM products_options_values pov, products_options_values_to_products_options o2v WHERE pov.products_options_values_id = o2v.products_options_values_id AND o2v.products_options_id = '1' AND pov.language_id = '2' HAVING value_count > 0 ORDER BY pov.sortID, pov.products_options_values_name

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