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e503d86f-4108-4c02-87e2-4fb5f7bd7459 error on saving EFATMAS and EFATKALEM:System.Data.SqlClient.SqlException 

(0x80131904): Cannot insert duplicate key row in object 'dbo.TBLEFATMAS' with unique index 'IND_TBLEFATMAS_1'.

The statement has been terminated.

   konum: System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)

   konum: System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)

   konum: System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)

   konum: System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady)

   konum: System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString)

   konum: System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async, Int32 timeout, Task& task, Boolean asyncWrite)

   konum: System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, TaskCompletionSource`1 completion, Int32 timeout, Task& task, Boolean asyncWrite)

   konum: System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(TaskCompletionSource`1 completion, String methodName, Boolean sendToPipe, Int32 timeout, Boolean asyncWrite)

   konum: System.Data.SqlClient.SqlCommand.ExecuteNonQuery()

   konum: Netsis.EFatura.DataObjects.Repository.EFatMasRepository.Save()

   konum: EFatura.Utility.EnvelopeHelper.CreateMasAndKalem(InsertEnvelopeResult envelopeResult)

ClientConnectionId:0edfacec-167a-4c97-9268-c331a39673d5