MySQL Error!
------------------------

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

Error Number:
3685

SELECT id, autor, date, short_story, SUBSTRING(full_story, 1, 15) as full_story, xfields, title, category, alt_name, comm_num, allow_comm, allow_rate, fixed, rating, vote_num, news_read, flag, editdate, editor, reason, view_edit, tags FROM dle_post WHERE category regexp '[[:<:]](7)[[:>:]]' AND approve AND date < '2018-09-20 15:29:26' ORDER BY fixed desc, date DESC LIMIT 12,6