Moved from http://blogs.msdn.com/vijgang

Applies to SharePoint 2007

While running content deployment import job on destination farm, you get the following error message and the import job fails.
This message would appear when trying to import a User.

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Your changes conflict with those made concurrently by another user. If you want your changes to be applied, click Back in your Web browser, refresh the page, and resubmit your changes.

[10/15/2009 1:01:22 AM]: Progress: Importing User Domain\UserName.
[10/15/2009 1:01:23 AM]: FatalError: Save Conflict
Your changes conflict with those made concurrently by another user. If you want your changes to be applied, click Back in your Web browser, refresh the page, and resubmit your changes.

   at Microsoft.SharePoint.Library.SPRequest.AddOrUpdateItem(String bstrUrl, String bstrListName, Boolean bAdd, Boolean bSystemUpdate, Boolean bPreserveItemVersion, Boolean bUpdateNoVersion, Int32& plID, String& pbstrGuid, Guid pbstrNewDocId, Boolean bHasNewDocId, String bstrVersion, Object& pvarAttachmentNames, Object& pvarAttachmentContents, Object& pvarProperties, Boolean bCheckOut, Boolean bCheckin, Boolean bMigration, Boolean bPublish)
   at Microsoft.SharePoint.SPListItem.AddOrUpdateItem(Boolean bAdd, Boolean bSystem, Boolean bPreserveItemVersion, Boolean bNoVersion, Boolean bMigration, Boolean bPublish, Boolean bCheckOut, Boolean bCheckin, Guid newGuidOnAdd, Int32& ulID, Object& objAttachmentNames, Object& objAttachmentContents, Boolean suppressAfterEvents)
   at Microsoft.SharePoint.SPListItem.UpdateInternal(Boolean bSystem, Boolean bPreserveItemVersion, Guid newGuidOnAdd, Boolean bMigration, Boolean bPublish, Boolean bNoVersion, Boolean bCheckOut, Boolean bCheckin, Boolean suppressAfterEvents)
   at Microsoft.SharePoint.SPListItem.MigrationAddOrUpdate(Boolean bAddNew, Boolean bIsPublish, Guid newGuidOnAdd, Boolean bNoVersion, Boolean suppressAfterEvents)
   at Microsoft.SharePoint.Deployment.ListItemSerializer.SetObjectData(Object obj, SerializationInfo info, StreamingContext context, ISurrogateSelector selector)
   at Microsoft.SharePoint.Deployment.XmlFormatter.ParseObject(Type objectType, Boolean isChildObject)
   at Microsoft.SharePoint.Deployment.XmlFormatter.DeserializeObject(Type objectType, Boolean isChildObject, DeploymentObject envelope)
   at Microsoft.SharePoint.Deployment.XmlFormatter.Deserialize(Stream serializationStream)
   at Microsoft.SharePoint.Deployment.ObjectSerializer.Deserialize(Stream serializationStream)
   at Microsoft.SharePoint.Deployment.ImportObjectManager.ProcessObject(XmlReader xmlReader)
   at Microsoft.SharePoint.Deployment.SPImport.DeserializeObjects()
   at Microsoft.SharePoint.Deployment.SPImport.Run()

[10/15/2009 1:01:26 AM]: Progress: Import Completed.
[10/15/2009 1:01:26 AM]: Finish Time: 10/15/2009 1:01:26 AM.
[10/15/2009 1:01:26 AM]: Completed with 0 warnings.
[10/15/2009 1:01:26 AM]: Completed with 1 errors.

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This is an expected error message if a user was created on the source farm and then post a deployment, the user was removed from the ‘All Users’ list on the source. Now when we try to import the user deletion activity to the destination farm, we get this error message.

Installing the June 09 CU ensures that the error message changes to non-Fatal and the content deployment import job succeeds.