Receiving webhooks from removed application

Hello
We have migrated from JWT application to Server-to-Server.
And migrated the webhook settings to the new app using the new secret token and updated validation process.
Our endpoint URL remains the same. I deleted old JWT application, but now we are receiving requests from the new application, as well as from the old one, which has already been deleted.

Hi @atop
Thanks for reaching out to us and welcome to our community, I am happy to help here!
I will go ahead and send you a private message so you can share with me more details and I can take a closer look into this issue
Cheers,
Elisa