config\settings.php

$settings['gallery_default'] = false;
$settings['gallery_default_name'] = 'venezuela';

Look in the config\settings.php and you will find the option currently set to false, then you also need to change the option for the name of the default gallery. It is as easy as that.

:)

These settings worked for me.
Thank You.
$settings['gallery_default'] = true;
$settings['gallery_default_name'] = 'venezuela';

If you have a gallery name My_venezuela. You need to put the same name here.

$settings['gallery_default_name'] = 'My_venezuela';