Event Definition does not appear Cron Scheduling

I’m working with Graylog 6.0.13. I’m trying to create an event definition with cron scheduling in Alerts, but I don’t see this option anywhere.
It’s hidden, not as it appears in the Graylog manual. How is this possible? Has it disappeared? Is there any way to make it appear, or has it been relocated in a separate menu?

I don’t think it was introduced until 6.1, so you must upgrade to get it.

I’ll try it, thanks.
I thought it was a feature I already had from past versions.

I have already updated to version 6.1.8 and it does appear there! thanks.