Hi,

It works nice when i save or save and publish the homepage after adding the block last in the block list marked with red frame, but when i save or publish the same node again, then it throws error.

I need help to figure out this issue and be able to save and publsh the homepage.

Microsoft.Data.SqlClient.SqlException (0x80131904): Cannot insert duplicate key row in object 'dbo.umbracoRelation' with unique index 'IX_umbracoRelation_parentChildType'. The duplicate key value is (2525, 4379, 6).
The statement has been terminated.
   at Microsoft.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
   at Microsoft.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
   at Microsoft.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady)
   at Microsoft.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj)
   at Microsoft.Data.SqlClient.SqlBulkCopy.RunParser(BulkCopySimpleResultSet bulkCopyHandler)
   at Microsoft.Data.SqlClient.SqlBulkCopy.CopyBatchesAsyncContinuedOnSuccess(BulkCopySimpleResultSet internalResults, String updateBulkCommandText, CancellationToken cts, TaskCompletionSource`1 source)
   at Microsoft.Data.SqlClient.SqlBulkCopy.CopyBatchesAsyncContinued(BulkCopySimpleResultSet internalResults, String updateBulkCommandText, CancellationToken cts, TaskCompletionSource`1 source)
   at Microsoft.Data.SqlClient.SqlBulkCopy.CopyBatchesAsync(BulkCopySimpleResultSet internalResults, String updateBulkCommandText, CancellationToken cts, TaskCompletionSource`1 source)
   at Microsoft.Data.SqlClient.SqlBulkCopy.WriteToServerInternalRestContinuedAsync(BulkCopySimpleResultSet internalResults, CancellationToken cts, TaskCompletionSource`1 source)
   at Microsoft.Data.SqlClient.SqlBulkCopy.WriteToServerInternalRestAsync(CancellationToken cts, TaskCompletionSource`1 source)
   at Microsoft.Data.SqlClient.SqlBulkCopy.WriteToServerInternalAsync(CancellationToken ctoken)
   at Microsoft.Data.SqlClient.SqlBulkCopy.WriteRowSourceToServerAsync(Int32 columnCount, CancellationToken ctoken)
   at Microsoft.Data.SqlClient.SqlBulkCopy.WriteToServer(DataTable table, DataRowState rowState)
   at Microsoft.Data.SqlClient.SqlBulkCopy.WriteToServer(DataTable table)
   at NPoco.SqlServer.SqlBulkCopyHelper.BulkInsert[T](IDatabase db, IEnumerable`1 list, SqlBulkCopyOptions sqlBulkCopyOptions, InsertBulkOptions insertBulkOptions)
   at NPoco.SqlServer.SqlBulkCopyHelper.BulkInsert[T](IDatabase db, IEnumerable`1 list, InsertBulkOptions insertBulkOptions)
   at NPoco.DatabaseTypes.SqlServerDatabaseType.InsertBulk[T](IDatabase db, IEnumerable`1 pocos, InsertBulkOptions options)
   at NPoco.Database.InsertBulk[T](IEnumerable`1 pocos, InsertBulkOptions options)
   at Umbraco.Cms.Infrastructure.Persistence.Repositories.Implement.RelationRepository.SaveBulk(IEnumerable`1 relations)
   at Umbraco.Cms.Infrastructure.Persistence.Repositories.Implement.ContentRepositoryBase`3.PersistRelations(TEntity entity)
   at Umbraco.Cms.Infrastructure.Persistence.Repositories.Implement.DocumentRepository.PersistUpdatedItem(IContent entity)
   at Umbraco.Cms.Core.Cache.DefaultRepositoryCachePolicy`2.Update(TEntity entity, Action`1 persistUpdated)
   at Umbraco.Cms.Infrastructure.Persistence.Repositories.Implement.EntityRepositoryBase`2.Save(TEntity entity)
   at Umbraco.Cms.Core.Services.ContentService.<>c__DisplayClass66_0.<CommitDocumentChangesInternal>g__SaveDocument|2(IContent c)
   at Umbraco.Cms.Core.Services.ContentService.CommitDocumentChangesInternal(ICoreScope scope, IContent content, EventMessages eventMessages, IReadOnlyCollection`1 allLangs, IDictionary`2 notificationState, Int32 userId, Boolean branchOne, Boolean branchRoot)
   at Umbraco.Cms.Core.Services.ContentService.SaveAndPublish(IContent content, String[] cultures, Int32 userId)
   at Umbraco.Cms.Web.BackOffice.Controllers.ContentController.PublishInternal(ContentItemSave contentItem, String defaultCulture, String cultureForInvariantErrors, Boolean& wasCancelled, String[]& successfulCultures)
   at Umbraco.Cms.Web.BackOffice.Controllers.ContentController.PostSaveInternal[TVariant](ContentItemSave contentItem, Func`3 saveMethod, Func`2 mapToDisplay)
ClientConnectionId:7bc91870-599d-41d4-8776-7b2bbd2629e0
Error Number:2601,State:1,Class:14