Hello I am doing a migration from CPM to d/EPM version 12.0.11.
In CPM there is a functionality that gives the customer the possibility to select all base elements of several aggregations simultaneously.

I am working with Self-Service and the customer needs to select two members that are aggregations and after that, select the base elements of each one at the same time.
We cannot do that because we select the two aggregations, and when we select base elements of one member, the leaf members replace the two members we selected.
