DPM 4.2 on SERV Template (Z.08.04)

We are writing to request a clarification regarding the latest DPM update dated 13 January, with specific reference to Template Z8.04. In the current version, the “Critical Function - ID” field (column 0040) is not included among the key fields. However, in Template Z8.05, the “Business Line ID” is defined as a key field. This difference creates a reporting challenge for us. A single service, identified by a unique Service Identifier, may support more than one critical function. If the “Critical Function” field is not part of the key, it is not possible to link multiple critical functions to the same service within the template. As a result, we would need to create multiple Service Identifiers for the same service, leading to an increased number of records across other templates, including Template Z8.01. Could you please confirm whether the exclusion of the “Critical Function - ID” from the key fields in Template Z8.04 reflects the intended approach?

Difference in the key fields in comparison to the previous version, it seems not coherent with the overall framework, considering that "Business Line ID" in the Z 08.05 is instead considered key field