2739853 - Logonid is ambiguous: AS Java SUM deployment issue

The SAP NetWeaver Application Server for Java upgrade fails due to user master data issues and errors similar to the below are recorded in the traces:

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Validating password of JEE Engine User <user details>
The following problem has occurred during step execution: com.sap.sdt.util.diag.DiagException: Could not display dialog UserPasswords.
WARNING Logonid <user details> is ambiguous. It is used by ....
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• SAP Release Independent
• SAP NetWeaver

SAP Composition Environment all versions ; SAP NetWeaver Application Server all versions ; SAP NetWeaver Application Server for Java all versions ; SAP NetWeaver all versions ; SAP Process Integration all versions ; SAP Solution Manager all versions ; SAP enhancement package 1 for SAP NetWeaver Composition Environment 7.1

jcmon, instance startup, SAP MMC, SMICM ,SAP Production ERP SRM CRM ERP PPM SEM APO XI PI PORTAL issue ume.r3.connection.master.sysnr ume.r3.connection.master.ashost RFC_SYS_EXCEPTION RFC_ERROR_LOGON_FAILURE 718383 1512766 dialog logon  SAP GUI cluster restart , KBA , BC-JAS-SEC-UME , User Management Engine , BC-JAS-SF , Startup Framework , Problem