It is not possible to clear (set to null) the Team custom field (customfield_11900) using Jira Cloud automation rules. When you try to set the field to null in an automation action (for example, using the advanced JSON editor), the value is not removed and the field remains unchanged. This is a current limitation of Jira Cloud automation, especially for certain custom fields like Team, and may also depend on your project configuration.
As a result:
The only way to clear or update the Team field to null is by using the Jira Cloud REST API (PUT /rest/api/3/issue/{issuekey}) with a payload like:
{
"fields": {
"customfield_11900": null
}
}
Note: This will only work if the field is not required in your field configuration.
API Token Requirement and Expiration
To use the Jira Cloud REST API, you must generate a personal API token linked to your Atlassian account.
By default, API tokens expire after one year (365 days) and you will need to renew and update your scripts or integrations with a new token each time.
All changes made via the API are attributed to the user who owns the API token. There is no way to hide or change the author in the issue history.
