MySQL error in file: /engine/modules/show.short.php at line 65

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 '[[:<:]](34|121|35|36|101|103|37|38|106|39|108|40|41|42|43|44|45|46|48|49|50|51|52|53|54|55|56|57|86|87|88|89|94|96|98|100)[[:>:]]' AND approve=1 ORDER BY fixed desc, date DESC LIMIT 0,200