ERROR (256): source file /home/electro4/dev/modules/database.php:66 ('Query failed: select product2 as id from products_similar where product1=5605 and product2<>5605 limit 5 union all select product1 as id from products_similar where product2=5605 and product2<>5605 limit 5 ; You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'union all select product1 as id from products_simi...' at line 2')

Execution Backtrace:

	File	Line	Function
	unknown	unknown	development_error_handler()
	/home/electro4/dev/modules/database.php	66	trigger_error()
	/home/electro4/dev/modules/database.php	98	db_failure()
	/home/electro4/dev/includes/products.php	111	db_query()
	/home/electro4/dev/product.php	239	Products::getSimilar()

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