Advantage supports configurable formulas only on stored data fields. The formula can be applied on a baseline field or an “added” field created via extensibility. The formula expression can refer to baseline and “added” fields in the formula expression to calculate the value of another field on the business object.
The configurable formula functionality is not intended to override/replace baseline formulas. Advantage will not allow configurable formula on a field if there is already a formula defined in baseline using Derivation Types Sum, Count, Parent Replicate, or Formula. This will avoid inconsistent application behavior with multiple formulas applied on the same field.
One exception to that is a configurable formula can be used to override a field default value behavior defined in the baseline.