Access Outer RG from the Inner RG

[luminrabbit]

Just found this which should solve the problem

Referencing a repeating group's index number from a nested repeating group

Hello! We have a repeating group (A) with another repeating group (B) living inside it. Each cell in Repeating Group B needs to be able to reference the index number of it’s “master parent cell” (i.e., the cell number its parent group is living in. So for example, it would look something like: Repeating Group A, Cell 1: Repeating Group B, Cell 1 Repeating Group B, Cell 2 Repeating Group B, Cell 3 Repeating Group A, Cell 2: Repeating Group B, Cell 1 - Repeating Group B, Cell 2. [i.e., <<—…