Query Error in 'CPSetSelection::execute' method in '/var/www/vhosts/kelly.co.uk/httpdocs/class.cp_sets.php' on line 8583, Unknown column 'REGIONAL_SITE_CPDA_ID' in 'where clause'

Full query: SELECT mainTable.cpda_id FROM cp_data AS mainTable LEFT OUTER JOIN cp_data AS table0 ON table0.cpda_meta_id = mainTable.cpda_id AND table0.cpda_meta_key = '54233' WHERE mainTable.cpda_meta_id = 805 AND mainTable.cpda_meta_key = 'set_element_stub' AND mainTable.cpda_active = 1 AND table0.cpda_meta_val = REGIONAL_SITE_CPDA_ID ORDER BY mainTable.cpda_seq, mainTable.cpda_id