Repeated notification cordova

I use the plug-in cordova-plugin-local-notifications And I call the following to display notifications of new messages:

id: notification_id,
at: new Date(),
title: 'text 1',
text: 'text 2'

The first time the notification appears, if I call this again, nothing happens. I've been changing the id, at, and text But still, the second time the notification does not appear. What could be the reason?