When trying to change applies to in the model - I get the error "Level mismatch on common dimension" - essentially switching out a list for another.
When you change a list in a module (whether its at the module level, or for a single line item), any related formulas must be aligned with the dimensions... this could relate to formulas in the module you are changing, or formulas in other modules (or even lists) that reference the module/line item you are changing.
When I make these types of changes, I usually do the following:
This sounds like a lot, but its quite efficient and orderly.
Cheers!