Issue installing plugin

I have an issue installing your plugin.
It can create few tables and send me message
“DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci; faite par activate_plugin, do_action(‘activate_events-made-easy/events-manager.php’), WP_Hook->do_action, WP_Hook->apply_filters, eme_install, _eme_install, eme_create_tables, eme_create_mqueue_table, maybe_create_table
[08-Feb-2019 11:35:05 UTC] Erreur de la base de données WordPress Invalid default value for ‘creation_date’ pour la requête CREATE TABLE wor4093_eme_mailings”
So in file events-manager.php I replace the lines :

creation_date datetime $default_current_ts,
modif_date datetime $update_current_ts,
per
creation_date datetime DEFAULT NULL,
modif_date datetime DEFAULT NULL,
And Now it works fine
Have you an idea of conséquences of that ?
Have I an anotherway to resolve the issue ?

Many thanks for this plugin
I will try to translate it in french