JPD How to create an automation to set "Target Quarter" from work item due date?

[André Ribeiro]

Hi,

I'm using Jira Product Discovery with a Team managed project.

I have 2 project specific fields:

1. Date field "Due Date" e.g. 2026-11-30
2. Short text field "Target Quarter" e.g. "2026 Q4"

I'm trying to use automation to set the "Target Quarter" from the "Due Date" by setting the formula to 

{{issue.duedate.format("YYYY")}} Q{{#=}}{{issue.duedate.month}}/3{{/=}}.ceil

but it always returns the following error (cf image below):

Edited work item successfully, however some of the set fields aren't available.

Fields ignored: Target Quarter (customfield_10487)

The rule is configured in the following way:

Can anyone help?

Thanks,