mysql Error [1055] : EXECUTE

URI: index.php?option=com_dogcompet&task=conductors&Itemid=15
Message: 'dogcompe_new.m.menutype' isn't in GROUP BY
SELECT m.*, sum(case when p.published=1 then 1 else 0 end) as cnt FROM elx_menu AS m LEFT JOIN elx_menu AS p ON p.parent = m.id WHERE m.menutype='topmenu' AND m.published='1' AND m.access IN (29) AND ((m.language IS NULL) OR (m.language LIKE '%english%')) GROUP BY m.id ORDER BY m.parent, m.ordering

PHP Error [Warning]

URI: index.php?option=com_dogcompet&task=conductors&Itemid=15
Path: /templates/dogcompet2/includes/tpl_functions.php
Line: 61
Invalid argument supplied for foreach()