Jira removing the assignees of issues created under REST API

[renato]

When creating an issue with the REST API I'm already assigning an Jira Account to that issue. (I'm already using the accountId, not the name). 
I get no error messages, the issue is created with the assigned account, but just after that Jira reassign the user to an "Unassigned" status for some reason. (I even get an email notification).

Not sure if this is a config, default behavior or if I'm doing something wrong.

'fields': { 'project': { 'key': DATA, }, 'summary': 'Testing Jira Automation', 'description': 'Testing...', 'issuetype': { 'name': 'Task', }, 'assignee': { 'id': '5df77...' }, 'parent': { 'key': 'DATA-1' } }

[Sachin · Accepted solution]

Hey Renato, did you check if there is any automation in place, something that would overwrite the assignee field value?

[renato]

I guess this could be the case. Where/How can I check if it is, and disable it? 

Thanks

[Sachin]

Goto your project settings > Automation and look for the Rules you have in place for that specific project, from there you can enable/disable them! 

[renato]

Thank you, there was indeed a rule there. 

[Sachin]

Awesome! Glad you found it