Hi All,

I have a 2 websites test and staging running on Umbraco version 7.12.4. Top of it, courier version 3.1.6 is installed. Everything looks fine in terms of setup but when I try to transfer a media image or any other content. I get the below error:

Deployment failed
Deployment of content could not complete due to an unexpected error, all changes have been cancelled

Unhandled exception occurred.Status: 500 Message: Internal Server Error</p><p>ExceptionType: System.Web.Services.Protocols.SoapException
Message: Server was unable to process request. ---> Error extracting item, ID: cc07b313-0843-4aa8-bbda-871c8da728c8_d8e6ad84-e73a-11df-9492-0800200c9a66, Name: Image, Type: Umbraco.Courier.ItemProviders.DocumentType ---&gt; could not insert: [Umbraco.Courier.Persistence.V6.NHibernate.EntityClasses.UmbracoNode][SQL: INSERT INTO umbracoNode (createDate, level, nodeObjectType, path, sortOrder, text, trashed, uniqueID, nodeUser, parentID) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?); select SCOPE_IDENTITY()] ---&gt; Cannot insert duplicate key row in object 'dbo.umbracoNode' with unique index 'IX_umbracoNodeUniqueID'. The duplicate key value is (cc07b313-0843-4aa8-bbda-871c8da728c8).
The statement has been terminated. StackTrace: at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)
   at System.Web.Services.Protocols.SoapHttpClientProtocol.EndInvoke(IAsyncResult asyncResult)
   at Umbraco.Courier.RepositoryProviders.WebServiceProvider.RepositoryWebservice.EndExtractItems(IAsyncResult asyncResult)
   at Umbraco.Courier.RepositoryProviders.CourierWebserviceRepositoryProvider.ExtractItems(Item[] items, Boolean overWrite)
   at Umbraco.Courier.Core.Extraction.RevisionExtraction.ExtractItems(List`1 nodes)
   at Umbraco.Courier.Core.Extraction.RevisionExtraction.ExtractReadyRevisionBatch()
   at Umbraco.Courier.Core.Extraction.RevisionExtraction.Extract()
   at Umbraco.Courier.Core.Tasks.ExtractionTask.Run()
   at Umbraco.Courier.Core.BackgroundTaskRunner`1.ConsumeTaskInternal(T task)
  End of stack trace from previous location where exception was thrown 
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at Umbraco.Courier.Core.TaskManager.GetSuccessfulProcessedTasks()
   at Umbraco.Courier.UI.Pages.ViewTaskManager.GetProcessed()