Can´t register to childrenevent

Hello,
it's terrible, again, something does not work anymore.
Now I can create parentevents and the children'events are created automatically. BUT now registration for a childrenevent is no longer possible.

Hi Bettin

Maybe there is something wrong with the settings of your event. Could you please submit a support ticket sending us:

1. Super admin account of your site

2. Send us the link to the page which these children events are being displayed but registration is not enabled

3. Tell me ID of a child event which is having this issue

I will check to see why registration is not enabled and guide you to correct it

Tuan

Hello Tuan,
thanks for the quick help!
Now I hope I have the right settings to finish my project. If someone has the same problem, here is Tuans answer that solved my problem.
"Look like the error happens because these events have same alias with other events created in the past. I went to Events Booking -> Configuration, look at SEF router settings tab, set Insert Event ID config option to Yes"

Best Regards
Bettin

Yes, that's correct. Thanks Bettin for sharing the answer here

Regards,

Tuan