Solution : https://service.sap.com/sap/support/notes/768876 (SAP Service marketplace login required)
Key words :
valid change license, transport organizer tools, display/change namespaces, undo role change, cancel role change, terms legacy system, namespace /sapdmc/ or2, namespace role, namespace /sapdmc/, /sapdmc/ namespace
Related Notes :
| 353995 | No valid change license available for namespace /SAPDMC/ |