Solution : https://service.sap.com/sap/support/notes/1029105 (SAP Service marketplace login required)
Key words :
'datasource/transfer structure' tab page, operational data store, longer adjusted automatically, terms rg 102 reason, double arrow button, 'replicate datasource' function, 'data object 'e_s_after_chg', change log manually, change log table, relevant transfer rule
Related Notes :
| 630854 | DataMart transfer rules cannot be activated |
| 499404 | ODS InfoSources can no longer be changed |