Hi,
In the note 483735 , it is clearly mentioned that it is better to create new self defined info structure without reference. Then you can create the bracket info structure of type D with copy of the self defined LIS.
You may refer the below document in order to define user defined info structure and update the historical data to the info structure as per requirement.
How to Create an LIS info structure - Purchasing - Part 1
How to Create an LIS info structure - Purchasing - Part 2
Update History Data to user defined LIS (Purchasing)
Regards,
AKPT