Automation for Locked fields

[Yuliia Zhyliaieva]

Hi!

I need to copy value from the locked Sprint field into a custom field "Sprint Number".

The reason is that a Sprint field values are for some reason not shown in the ProductBoard used by the Product Owner, since it is not a custom field.

So, I created a custom field "Sprint Number", where I want to have value from Sprint copied every time the Sprint field is updated.

But can't formulate the automation rule: