1731956 - Error during the install: There is already an object named 'MML_BW_Data_Source_Type' in the database - Metadata Management 12.1

Installation  hangs, producing the following error in the  installation log  <BOE_HOME>\MetadataManagement\MM\log folderMMInstallUtility.log:

  E-3026103] 2012-06-15 14:16:48.187 There is already an object named 'MML_BW_Data_Source_Type' in the database.
 [C-0000000] 2012-06-15 14:16:48.187 java.sql.SQLException: There is already an object named 'MML_BW_Data_Source_Type' in the database.
 at com.businessobjects.connectionserver.java.drivers.ErrorManager.getError(Unknown Source)
 at com.businessobjects.connectionserver.java.drivers.helpers.ErrorHandler.fillErrorSet(Unknown Source)
 at com.businessobjects.connectionserver.java.drivers.helpers.ErrorHandler.getErrors(Unknown Source)
 at com.businessobjects.connectionserver.java.drivers.jdbc.JDBCDriver.prepare(Unknown Source)
 at com.businessobjects.connectionserver.java.JAVAOpenJob.execute(Unknown Source)
 at com.businessobjects.connectionserver.core.OpenJob.Execute(Unknown Source)
 at com.businessobjects.connectionserver.core.OpenJob.Execute(Unknown Source)
 at com.bobj.mm.core.sqlimpl.CSSQLProcessor.executeUpdateImpl(CSSQLProcessor.java:95)
 at com.bobj.mm.core.MMSqlProcessor.executeUpdate(MMSqlProcessor.java:290)
 at com.bobj.mm.core.sqlimpl.CSProcessorManager.executeUpdate(CSProcessorManager.java:347)
 at com.bobj.mm.core.MMWarehouse.executeUpdate(MMWarehouse.java:1144)
 at com.bobj.mm.util.SqlHelper.executeCmd(SqlHelper.java:213)
 at com.bobj.mm.util.SqlHelper.executeCmds(SqlHelper.java:103)
 at com.bobj.mm.installer.TableInitializer.create(TableInitializer.java:517)
 at com.bobj.mm.installer.DatabaseInitializer.createTables(DatabaseInitializer.java:297)
 at com.bobj.mm.installer.DatabaseInitializer.createTables(DatabaseInitializer.java:289)
 at com.bobj.mm.installer.DatabaseInitializer.execute(DatabaseInitializer.java:124)
 at com.bobj.mm.installer.MMInstallUtility.installRepository(MMInstallUtility.java:748)
 at com.bobj.mm.installer.MMInstallUtility.execute(MMInstallUtility.java:418)
 at com.bobj.mm.utility.Utility.runExecute(Utility.java:437)
 at com.bobj.mm.core.Main.run(Main.java:1175)
 at com.bobj.mm.core.Main.main(Main.java:229)

[E-3026193] 2012-06-15 14:16:48.187   SQLSTATE=null, SQLCODE=0.

Metadata Management "BOMM" build version 12.1.0.1

KBA , EIM-MM , Metadata Management , Problem