Solution : https://service.sap.com/sap/support/notes/556491 (SAP Service marketplace login required)
Key words :
symptom combined node names, -- solution import support package 6, rsndi_shie_structure_update function module, attribute instances involved, bw support packages, 0b support package 06, support package, 0b patch 06, sapbwnews bw 3, hierarchy update