MySQL error in file: /engine/modules/show.full.php at line 1139

Error Number: 1191

The Error returned was:
Can't find FULLTEXT index matching the column list

SQL query:

SELECT id, date, short_story, xfields, title, category, alt_name FROM dle_post WHERE MATCH (title, short_story, full_story, xfields) AGAINST ('Друзья на одну неделю (2017) - смотреть онлайн фильм бесплатно ') AND id != 54638 AND approve=1 AND date < '2019-11-12 14:31:50' LIMIT 7