Just a few things I noticed while looking this over:

1. I cannot see the images you posted
2. In your custom fields you have "paragrah" - is this the correct field name
3. The underlying type of a Major Incident is still a ticket - therefore, it will require a status, priority, urgency, subject, and description.

@support@devopsintegration.io, as @mbutler mentioned, Your field name seems to be a typo unless it was intentionally a field labeled “paragrah”. That would certainly cause the API request to fail.

In another post of yours I made a similar suggestion, but I would point you to raise your inquiry over in the developer community, where API issues get a little bit more visibility.

Hi @zachary.king and @mbutler 

Thanks for your reply

1. The field paragraph exists in the fields section and using the same request is working fine for the Incident tickets
2. Only if its a Major incident then its not working
3. Not sure if its a Major Incident then we need to something else as well
4. I already posted the same to @developer community

I really appreciates your time on this

Thanks

No worres - the thing I had mentioned above shows “paragrah” instead of “paragraph”

Hi @mbutler 

Looks like its typo in my fields as well see below

The field name is Paragrah Lol

Anyways thanks for pointing it out

Thanks