An Error Was Encountered

Error Number: 126

Incorrect key file for table '/tmp/#sql_7f57_0.MYI'; try to repair it

SELECT DISTINCT ra.* FROM rss_source AS rs JOIN rss_source_has_article AS sha ON sha.rss_source_id = rs.rss_source_id JOIN rss_article AS ra ON sha.rss_article_id = ra.rss_article_id WHERE rs.rss_source_id IN (1, 2, 3, 4, 5, 6)