select wr_id, wr_subject from g4_write_hs_korart where wr_is_comment = 0 and wr_num = '-50' and wr_reply < '' and ((INSTR(wr_11, '201904') or INSTR(wr_subject, '201904')) ) order by wr_num desc, wr_reply desc limit 1

1054 : Unknown column 'wr_11' in 'where clause'

error file : /bbs/board.php