Solution : https://service.sap.com/sap/support/notes/300210 (SAP Service marketplace login required)
Key words :
additional key words cj20n, delete wbs elements, network activities, status forbids, project builder, prerequisites solution, 'corrections' section
Related Notes :
| 301934 | Deleting a WBS element deletes incorrect activities |
| 200568 | Delete WBS elements and objects |