Unable to create some type of objects with error "wt.pom.UniquenessException: <Object type> - xxxx is not unique" in Windchill PDMLink

• Unable to create Change Notice with below error in MethodServer logs: 

  ERROR com.ptc.windchill.enterprise.change2.forms.ChangeManagementFormProcessorHelper xxxx  - wt.vc.VersionControlException: wt.util.WTException: wt.pom.UniquenessException: WTChange Order2 - xxxx is not unique.
  Nested exception is: wt.pom.UniquenessException: WTChange Order2 - xxxx is not unique.
  Nested exception is: wt.util.WTException: wt.pom.UniquenessException: WTChange Order2 - xxxx is not unique.
  Nested exception is: wt.pom.UniquenessException: WTChange Order2 - xxxx is not unique.
  wt.vc.VersionControlException: wt.util.WTException: wt.pom.UniquenessException: WTChange Order2 - xxxx is not unique.
  Nested exception is: wt.pom.UniquenessException: WTChange Order2 - xxxx is not unique.
  Nested exception is: wt.util.WTException: wt.pom.UniquenessException: WTChange Order2 - xxxx is not unique.
  Nested exception is: wt.pom.UniquenessException: WTChange Order2 - xxxx is not unique.
      at wt.fc.StandardIdentityService.storeSemanticKeys(StandardIdentityService.java:446)
      at wt.fc.StandardIdentityService$1.notifyVetoableMultiObjectEvent(StandardIdentityService.java:132)
      at wt.events.StandardKeyedEventBranch.intDispatchEvent(StandardKeyedEventBranch.java:306)
      at wt.events.StandardKeyedEventBranch.dispatchVetoableMultiObjectEvent(StandardKeyedEventBranch.java:268)
      at wt.events.StandardKeyedEventDispatcher.intDispatchEvent(StandardKeyedEventDispatcher.java:306)
      at wt.events.StandardKeyedEventDispatcher.dispatchVetoableMultiObjectEvent(StandardKeyedEventDispatcher.java:244)

• Unable to create WTPart with error:

Part Master - xxxx is not unique

• Unable to create WTDocument with the below error:

wt.pom.UniquenessException: Document - xxxx is not unique

• Unable to create Resource Group with error: 

Resource Group - xxx is not unique

• Unable create document using Loadfromfile command due to error 

Nested exception is: wt.pom.UniquenessException: Publication xxxx  - mpmcreoIllustrateImage.c3di is not unique.
               at wt.fc.StandardIdentityService.storeSemanticKeys(StandardIdentityService.java:446)
               at wt.fc.StandardIdentityService$1.notifyVetoableMultiObjectEvent(StandardIdentityService.java:132)

• Unable to Request Deliverables from Variant Specification with error:

Part Master - xxx is not unique