MySQL error in file: /engine/modules/show.short.php at line 64

Error Number: 3685

The Error returned was:
Illegal argument to a regular expression.

SQL query:

SELECT p.id, p.autor, p.date, p.short_story, CHAR_LENGTH(p.full_story) as full_story, p.xfields, p.title, p.category, p.alt_name, p.comm_num, p.allow_comm, p.fixed, p.tags, e.news_read, e.allow_rate, e.rating, e.vote_num, e.votes, e.view_edit, e.editdate, e.editor, e.reason FROM dle_post p LEFT JOIN dle_post_extras e ON (p.id=e.news_id) WHERE category regexp '[[:<:]](542|543|544|545|546|547|548|549|550|551|552|553|554|555|556|557|558|559|560|561|562|563|564|565|566|567|568|569|570|571|572|573|574|575|576|577|578|579|580|581|582|583|584|585|586|587|588|589|590|591|592)[[:>:]]' AND approve=1 AND date < '2025-07-19 02:53:49' ORDER BY fixed desc, date DESC LIMIT 0,12