A Database Error Occurred

Error Number: 1055

Expression #8 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'admin_pp.bi.image' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by

SELECT `b`.*, `bi`.`image` FROM `projects` `b` LEFT JOIN `project_images` `bi` ON `bi`.`project_id` = `b`.`id` WHERE `b`.`slug` = 'red-naped-ibis' GROUP BY `b`.`id` ORDER BY `b`.`order` ASC LIMIT 1

Filename: models/Project_model.php

Line Number: 97