Not able to add/update JIRA labels via REST API

[Amine Rouh]

Hi

Im not able to add labels to JIRA tickets through REST API ( trying with Postman)

PUT request to https://mydomain.atlassian.net/rest/api/3/issue/{ID} :

`

{

       "fields": {

               "labels": [

                         "Testing",

                         "Automation"

              ] 

        }

}

`

I also tried the update syntax and getting the same error :

`

{"update": {"labels": [{"add": "Label_10"}]}}

`

I receive the famous error : 

"errors": {

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

}

Please note : 

- I can see Labels on both creation screens and when I check any ticket

- My authorizations are correct

- I tried both API V3 and V2 

- Same code worked a couple of months ago without any issue, and no admin is aware of any changes or restrictions.

[Amine Rouh]

For anyone who tried all the possible approaches above, I know why it's happening. Basically, it comes to the field configuration in JIRA,
https://github.com/pycontribs/jira/issues/16#issuecomment-71475148 

A simple test :
 - User 1, creates a ticket in JIRA, using postman or your script try to add/edit labels with the User 1 credentials => Works. 
 - User 1, creates a ticket in JIRA, using postman or your script try to add/edit labels with the User 2 credentials => It will give the error mentioned above. Only the owner can edit via REST API the labels. 

Looking for any documentation on how to resolve this from the project configuration 

[Amine Rouh]

Based on this post   I check my Edit screen and I see the labels. so I'm out of leads on how to resolve this.