SAP Message USMD1A006 - Higher-level and predecessor nodes: Deviating values of entity type &1

Diagnosis
You can only process higher-level nodes and predecessor nodes inindividual processing if the higher-level entity types are restricted tothe same value for all affected nodes (both nodes to be assigned andexisting nodes).

System Response
The higher-level nodes and predecessor nodes cannot be changed inindividual processing.

Procedure
Use hierarchy processing to process the higher-level nodes andpredecessor nodes.