MySQLi error


				<h1>MySQLi error</h1>
				<h2>Query:</h2>
				<pre>SELECT IF(l1.string_id,l1.string_text,IF(l2.string_id,l2.string_text, l.string_text)) AS string
			FROM strings AS l
			LEFT JOIN strings AS l1 ON l1.language_id = 1 AND l.string_id = l1.string_id
			LEFT JOIN strings AS l2 ON l2.language_id = 1 AND l.string_id = l2.string_id
			WHERE l.string_id = '1'
			GROUP by l.string_id</pre>
				<h2>Details:</h2>
				<b>Bestand:</b> /home/vebrest7/public_html/includes/classes/translate.php<br />
				<b>Regel:</b> 267<br />
				<b>Error:</b><br />Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'vebrest7_rijnstrt.l.string_text' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by