MySQL error in file: /engine/modules/show.full.php at line 1241

Error Number: 1

The Error returned was:
Can't create/write to file '/var/tmp/#sql_744_0.MAI' (Errcode: 28)

SQL query:

SELECT id, date, short_story, xfields, title, category, alt_name, MATCH (title, short_story, full_story, xfields) AGAINST ('Мы расскажем вам о том, как мы в садике живём! ') as score FROM dle_post WHERE MATCH (title, short_story, full_story, xfields) AGAINST ('Мы расскажем вам о том, как мы в садике живём! ') AND id != 254 AND approve=1 AND date < '2023-06-03 05:15:35' ORDER BY score DESC LIMIT 5