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

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

Error Number:
3685

SELECT id, autor, date, short_story, full_story, xfields, title, category, alt_name, comm_num, allow_comm, allow_rate, fixed, rating, vote_num, news_read, votes, flag, editdate, editor, reason, view_edit, tags FROM body_post WHERE category regexp '[[:<:]](2)[[:>:]]' AND approve AND date < '2020-10-22 15:40:42' ORDER BY fixed desc, date DESC LIMIT 0,4