Query Error in 'CPSetSelection::execute' method in '/var/www/vhosts/www.mitchellson.co.uk/httpdocs/class.cp_sets.php' on line 8526, Server shutdown in progress

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 = '-2001' LEFT OUTER JOIN cp_data AS table1 ON table1.cpda_meta_id = mainTable.cpda_id AND table1.cpda_meta_key = '-2002' WHERE mainTable.cpda_meta_id = -2 AND mainTable.cpda_meta_key = 'set_element_stub' AND table0.cpda_meta_val = '67' AND table1.cpda_meta_val = -1999 LIMIT 0, 1