Craft Internal Server Error I am getting the following error:

Internal Server Error
CDbCommand failed to execute the SQL statement: SQLSTATE[42000]: Syntax error or access violation: 1055 Expression #34 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'pottings_website.sources1.sortOrder' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by


I have no idea how to fix it.

Its Craft 2.6.2911
PHP 5.6
I have tried the methods answered in this similar question:

Getting this SQL Error: GROUP BY incompatible with sql_mode=only_full_group_by

To fix my issue all I did was edit this file:

nano /etc/my.cnf


with the following line:

sql_mode="NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES"


The website was back up and running instantly.