API Add webinar registrant to a specific occurrence id not working

When I send a request to add a webinar registrant to a specific occurrence id, the registration is done on the first available date and not the one corresponding to the occurrence id sent.
My request send the right occurrence id. But the confirmation email show the first date available for this webinar.
Can you tell me if there is a problem with the API about that ?
I saw a topic without response about that: Cannot register an attendee to a specific occurrence... STILL
Thank you for your help.

Hi @cyril

Thanks for reaching out to the Zoom Developer Forum and welcome to our community!
I am happy to help here!
Could you please share with me the registration type that you assigned to the webinar in question?
As well as the entire request that you are sending when adding webinar registrant to a specific occurrence, with the request url?
Just make sure to not share any personal data (you can edit emails and personal data):slight_smile: