Support on Domain name change during Upgrade process in Windchill PDMLink

"(wt.services.servicesResource/21) wt.services.ManagerException: Unable to start manager: "wt.index.IndexPolicyManager" with implementation class: "wt.index.StandardIndexPolicyManager""
"Cannot process participant XXXX because a related disconnected participant wt.org.WTOrganization:XXX exists in the database"

ERROR [main] com.ptc.windchill.upgrade.statemachine.state.PhaseEventUpgradeState - Upgrade execution failed with the exception:
wt.util.WTException: wt.util.WTException: 
ERROR: You must login as a user from the Administrator group.
Please verify the user name of the Administrator and the password.
You will have to "Exit" and start at the very beginning before you try again.
Nested exception is: (wt.session.sessionResource/2) wt.org.UserNotFoundException: User not found: unknown web name: "wcadmin".
Nested exception is: wt.util.WTException: 
ERROR: You must login as a user from the Administrator group.
 Please verify the user name of the Administrator and the password.
You will have to "Exit" and start at the very beginning before you try again.
Nested exception is: (wt.session.sessionResource/2) wt.org.UserNotFoundException: User not found: unknown web name: "wcadmin".
at wt.method.RemoteMethodServer.invoke(RemoteMethodServer.java:791)
at wt.services.ServiceFactory$ClientInvocationHandler.invoke(ServiceFactory.java:349)
at wt.services.ServiceFactory$DynamicInvocationHandler.invoke(ServiceFactory.java:300)
at com.sun.proxy.$Proxy12.setAdministrator(Unknown Source)

ERROR [main] wt.audit.StandardAuditService  - Project Audit Service: failed to set Administrator (ok if installation)
ERROR [main] wt.lifecycle  - LifeCycle Service: failed to set Administrator (ok if installation)
ERROR [main] wt.access.agreement.StandardAgreementService  - Agreement Service: failed to set Administrator (ok if installation)
ERROR [main] wt.wrmf  - wrmf.delivery.ShippingService: failed to set Administrator (ok if installation)
ERROR [main] wt.workflow.forum.StandardForumService  - StandardForumService : failed to set Administrator (ok if installation)
ERROR [main] com.ptc.windchill.counterpart.StandardCounterPartService  - Failed to set Administrator (ok if installation)
ERROR [main] com.ptc.netmarkets.folder.StandardNmFolderService  - Folder Service: failed to set Administrator (ok if installation)
(wt.session.sessionResource/2) wt.org.UserNotFoundException: User not found: unknown web name: "wcadmin".
at wt.session.StandardSessionManager.getAuthenticatedUser(StandardSessionManager.java:468)
at wt.session.StandardSessionManager.realUserIsAdministrator(StandardSessionManager.java:486)
at wt.session.StandardSessionManager.setAdministrator(StandardSessionManager.java:276)
at sun.reflect.GeneratedMethodAccessor24.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at wt.method.MethodResultWriter.writeExternal(MethodResultWriter.java:165)
at wt.method.MethodResult.writeExternal(MethodResult.java:226)