Jira Automation, SubTask summary contains form fields

Paula Brück_v2itwb

I would like to create a SubTask via Jira Automation. The SubTask summary should contain information (last name and start date) from a previously submitted form within the parent issue. 

The form from which the information should be taken is not the trigger shown in the screenshot ("EmployeeLifecycleManagement_Manager_DE"). It is a differen form which is attachted to the parent issue.

My current automation looks like this:

Can someone help me to extend the summary of the SubTask?

Paula Brück_v2itwb

I have done the following:

I created two new custom fields: name and Start Date. These are the two pieces of information that I wanted to be displayed in the SubTask summary. I then linked the custom field to the corresponding field in the form.
In the automation, I then added the following information to the SubTask summary "Useranlage {{issue.parent.Last name}} {{issue.parent.Start date}}".