Screen Error: Unable to create issue with custom fields but can edit those fields value

[RAlam]

Hello All,

I am using rest API to edit a few custom fields in a Jira issue. I can do it successfully.

Method: PUT

Body:

{"fields": {"customfield_32456":{"value": "Follow-up"}}}

But when I create an issue of the same issueType with the same custom fields, I'm getting a screen error.

Method: POST

Error:

{

"errorMessages": [],

"errors": {

"customfield_32466": "Field 'customfield_32466' cannot be set. It is not on the appropriate screen, or unknown.",

"customfield_32457": "Field 'customfield_32457' cannot be set. It is not on the appropriate screen, or unknown.",

"customfield_32456": "Field 'customfield_32456' cannot be set. It is not on the appropriate screen, or unknown.",

"customfield_32830": "Field 'customfield_32830' cannot be set. It is not on the appropriate screen, or unknown.",

"customfield_32458": "Field 'customfield_32458' cannot be set. It is not on the appropriate screen, or unknown."

 }

}

Like most of you, I thought the Edit screen might have those fields but create not. But I was wrong. Both, the Edit Screen and the Create Screen have exactly the same fields allowed. 

Further to that, we have a dev replica of the prod JIRA. It also has the same custom fields and screens. But there, I can create an issue with the above custom fields. I'm using the same request body for both dev & prod requests.

Does anyone have any further leads on it so that I can follow that to resolve this issue?

[RAlam · Accepted solution]

Facepalm moment.

While editing the value of a field (system or custom) we don't need to specify any project ID.

However, to create an issue, we have to. I used the project ID from the dev JIRA while requesting the prod one. 

That was the reason editing was successful and creation not.