Why DOMO USE ONY and watermark is still on my agreement even I subscribed a pro plan?

I have subscribed to the Pro plan, but when I tested the e-signature feature, I noticed that the email title still contains [DEMO USE ONLY] and there is a watermark stating ‘SIGN TEST DOCUMENT’ in my agreement. Could you please advise on how to remove these, or let me know if there might be an issue with my account or plan?

Thank you for your assistance.