Solution : https://service.sap.com/sap/support/notes/935474 (SAP Service marketplace login required)
Key words : 
source sap cr content versions, terms sld mergeexchange infrastructure, application-specific sld destinations, sap cim model version, source sld takes priority, sap cr content, sap cim model, empty cim namespace, system landscape directory, large system landscapes
Related Notes : 
       
| 1630050 | SAP NetWeaver Landscape Virtualization Management 1.0 - Std | 
| 1527538 | SAP NetWeaver Landscape Virtualization Management 1.0 | 
| 1462332 | ACC 7.3 - Adaptive Computing Controller Collect. Note | 
| 1375863 | ACC 7.2 - Adaptive Computing Controller Collect. Note | 
| 1008828 | ACC 7.1 PI / Adaptive Computing Controller Collective Note | 
| 936318 | Splitting an SLD instance | 
| 935245 | Importance of "Object Server" SLD/LMDB parameter | 
| 720717 | Reduce the number of System Landscape Directories (SLD) |