To disable strict SQL mode, SSH in to your server as root and create this file:
/etc/mysql/conf.d/disable_strict_mode.cnf
Open the file and enter these two lines:
[mysqld] sql_mode=IGNORE_SPACE,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION
Restart MySQL with this command:
sudo service mysql restart
To verify that the process was completed properly you can run the following:
mysql -e "SELECT @@sql_mode;"