2926645 - "dberror (Prepared Statement:execute Update): - 129 transaction rolled by an internal error" in SAP Analytics Cloud (SAC)

The following error message occurs in SAP Analytics Cloud (SAC):
dberror (Prepared Statement:execute Update): - 129 transaction rolled by an internal error:External user name *** already exists on provider

SAP Analytics Cloud (Enterprise) 

SAP Cloud for Planning, s, Cloud for Analytics, Cloud4Analytics, CloudforAnalytics,  SAC, SAP AC, Cloud-Analytics, CloudAnalytics, SAPCloudAnalytics,Error, Issue, System, Data, User, Unable to create new user , user has no access Access,, Sac, Set, setup new user, Failed to create new user, sapanalyticscloud, sap analytical cloud, sap analytical cloud, SAC, dberror (Prepared Statement:execute Update): - 129 transaction rolled by an internal error:External user  name  already exists on provider,  name already exiists on provider, dberror (Prepared Statement:execute Update),  129 transaction rolled by an internal error, External user name already exists on provider, username, email , KBA , LOD-ANA-DES , Story Design & Visualizations , Problem