Unable to add/edit field Epic Name to Task and Sub-Task

[Jar Lady]

I want to get the epic name for my sub-task that is linked in this manner - Epic->Story->Task->Sub-Task.

But when i try to add/edit the Epic name field via Jira Automation Rule, there is error below.

Unknown fields set during edit, they may be unavailable for the project/type. Check your custom field configuration. Fields ignored -

Epic Name (customfield_10104)

[Trudy Claspill]

Hello @Jar Lady 

The Epic Name field is used only in Epic type issues. That field does not get used in any other issue type.

You may be thinking of the Epic Link field. That field shows in the issues that are children of the Epic, and will display the Epic's Name, but the field actually stores the Epic's issue key.

The native hierarchy of Jira is

Epic
|-- standard level issues such as Story, Task, and Bug
    |-- sub-task level issues

Sub-task issues would not contain the Epic Link field because they are not directly linked to the Epic. They are only indirectly linked through their parent issue that is at the Standard Level.

Also, given that default hierarchy a Task could not actually be hierarchically below a Story, so I am unclear how you are achieving 

Epic->Story->Task->Sub-Task