Cannot set default value for Found In field

Note that for Found-In (a deliverable), there is no built in default value provider. You would have to use JavaScript or Java. If you use JavaScript, you have to configure the values and you have to return the UUID of the deliverable. There is no way to access the deliverables from JavaScript.

See and do the
- the RTC only version of it. Lab 4 and Lab 5 (JavaScript). Also see https://jazz.net/wiki/bin/view/Main/AttributeCustomization

You might be able to use Java instead to create a more elaborate version. In Java you are likely able to access this data.  See https://rsjazz.wordpress.com/2013/06/26/attribute-customization-java-based-value-providers-conditions-and-validators/ for more information.

Default values come from entries created in the Attribute Customization section [ just below Types and Attributes ].  However, Deliverable ( release ) is not one of the Providers for defaults.   Releases created in the project configuration are used for "Found In"

You will first need to create a new default value with provider "Script Based Default" under Project Configuration > Configuration Data > Work Items > Attribute Customization. Then you can assign the default value to the Found In attribute, using the GUI in your original post.

 Does it mean I cannot set default value for Deliverable (Release) ?