Solution : https://service.sap.com/sap/support/notes/611780 (SAP Service marketplace login required)
Key words : 
relevant sdas/swcs, development components contained, software components contained, sdm patch level 8, latest sdm version, update deployment reason, additional white spaces, 'update' deployment action, sdm version 1, update deployment
Related Notes : 
       
| 532892 | Installing a new version of the Software Delivery Manager |