Database query duplicated alias

Hello,

I have made some changes to the WooCommerce Index so that it better fits my needs. It worked pretty well for a long time, but now I get a weird error.

First, it works fine when my customizing is disabled. But maybe you can give me a hint. I have not found anything useful by searching with Google.

I use the initial query to get the posts with my customized index-template. With “$query->set()” I do some small modifications like changing ‘posts_per_page’..

But it creates a duplicated alias ‘price_query’ when I filter the posts by price. Works well with all other filter options, and it works also well with the Woo-Widgets.

Any idea how I can fix this?

Thank you and best regards

[18-Aug-2017 10:38:22 UTC] WordPress database error Not unique table/alias: 'price_query' for query SELECT SQL_CALC_FOUND_ROWS  preffix_posts.ID FROM preffix_posts  INNER JOIN ( SELECT post_id, max( meta_value+0 ) price FROM preffix_postmeta WHERE meta_key='_price' GROUP BY post_id ) as price_query ON preffix_posts.ID = price_query.post_id  INNER JOIN ( SELECT post_id, max( meta_value+0 ) price FROM preffix_postmeta WHERE meta_key='_price' GROUP BY post_id ) as price_query ON preffix_posts.ID = price_query.post_id  WHERE 1=1  AND (
  preffix_posts.ID NOT IN (
				SELECT object_id
				FROM preffix_term_relationships
				WHERE term_taxonomy_id IN (49)
			)
) AND preffix_posts.post_type = 'product' AND ((preffix_posts.post_status = 'publish')) GROUP BY preffix_posts.ID ORDER BY  price_query.price DESC  LIMIT 0, 6 made by require('wp-blog-header.php'), wp, WP->main, WP->query_posts, WP_Query->query, WP_Query->get_posts