Can't execute query

SELECT p.*,c.id as cid FROM products_tw as p, categories_tw c, products_category_tw as it WHERE (p.id = '08697254' || p.serial_no = '08697254') AND p.id = it.pid AND it.category=c.id AND (p.available='1' OR (p.available='2' and p.sdate <= '2018-06-25' AND p.edate >= '2018-06-25')) AND c.available = '1' AND it.category in (������������) GROUP by it.pid

MySQL Error: Unknown column '������������' in 'where clause'

This script cannot continue, terminating.