Can we regenerate New DKIM signature in Cpanel?

I am a marketing trainer, I teach my participants how to better their email deliverability by configure spf, dkim and dmarc in my email marketing session. some of my class is doing online with recording, and since during demonstration, I expose my DKIM in the recording session. I believe it will also impact the security if the recording been leak out to public. Is there a way for me to regenerate a new DKIM at cpanel?