MySQL error in file: /engine/modules/show.full.php at line 751

Error Number: 1055

The Error returned was:
Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'old_igroutka_net.dle_dev.dev_show' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by

SQL query:

SELECT dev_show FROM dle_dev WHERE dev='Igroutka' GROUP By dev