A Database Error Occurred

Error Number: 1055

Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'qurtubae_uni.jms_paper_published.paper_id' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by

SELECT * FROM `jms_paper_published` WHERE `volume` != '14' OR `number` != '2' GROUP BY `volume`

Filename: models/A_jms_paper_publish_model.php

Line Number: 236