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 'in-spanien-so-viel-teurer-geworden)' at line 3
SELECT new FROM news_news_categories WHERE cat IN (4,13,19,20,21,warum-ist-die-autovermietung-in-spanien-so-viel-teurer-geworden)