Use field values in the message of a validation business rule

Hi experts,

This is somewhat of a trivial question. I’m attempting a basic validation on the task line under a request

the validation is to throw an error if,

Material Order Date > Delivery Date

Delivery Date > Planned Start

The business rule I created is as following,

The business rule works ok. But the validation message is not picking up the task id. It’s appearing as following,
 

What’s the correct way to refer to the fields of the related table in the message?