can not modify newly added lectures

after publishing the live course, when you want to update the course this happens:
when you add a new lecture and save it, then go back to edit it again you will get following error:

https://sharing.clickup.com/clip/p/t9004002740/af2b4867-23e2-4b5a-8bfb-3b8be6b8f550/screen-recording-2025-05-24-16%3A04.webm