server error

When I tried to ‘seol’ modúl3 cleachtadh2 I got this message, please help, thanks.

Server Error in ‘/’ Application.

ERROR [23000] [Microsoft][ODBC SQL Server Driver][SQL Server]Cannot insert duplicate key row in object ‘tblStudentExerciseRecords’ with unique index ‘tblStudentRecordstblStudentExerciseRecords’.
ERROR [01000] [Microsoft][ODBC SQL Server Driver][SQL Server]The statement has been terminated.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Data.Odbc.OdbcException: ERROR [23000] [Microsoft][ODBC SQL Server Driver][SQL Server]Cannot insert duplicate key row in object ‘tblStudentExerciseRecords’ with unique index ‘tblStudentRecordstblStudentExerciseRecords’.
ERROR [01000] [Microsoft][ODBC SQL Server Driver][SQL Server]The statement has been terminated.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[OdbcException (0x80131937): ERROR [23000] [Microsoft][ODBC SQL Server Driver][SQL Server]Cannot insert duplicate key row in object ‘tblStudentExerciseRecords’ with unique index ‘tblStudentRecordstblStudentExerciseRecords’.
ERROR [01000] [Microsoft][ODBC SQL Server Driver][SQL Server]The statement has been terminated.]

  System.Data.Odbc.OdbcConnection.HandleError(OdbcHandle hrHandle, RetCode retcode) 1156770

  System.Data.Odbc.OdbcCommand.ExecuteReaderObject(CommandBehavior behavior, String method, Boolean needReader, Object[] methodArguments, SQL_API odbcApiMethod) 1147

  System.Data.Odbc.OdbcCommand.ExecuteReaderObject(CommandBehavior behavior, String method, Boolean needReader) 61

  System.Data.Odbc.OdbcCommand.ExecuteNonQuery() 92

  Ranganna.DataAgent.postVisitExercise(Int32 id, Int32 idStep, String answer, Int32 success, Int32 rght, Int32 wrng, Int32 sum, Boolean bottom) 945

  Ranganna.Ceim.Page_Load(Object sender, EventArgs e) 4098

  System.Web.UI.Control.OnLoad(EventArgs e) 99

  System.Web.UI.Control.LoadRecursive() 50

  System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +627

Version Information: Microsoft .NET Framework Version:2.0.50727.3603; ASP.NET Version:2.0.50727.3614

Síochánaí, a chara,

I suspect that what happened is that you tried to restart the exercise by pressing the ‘back’ arrow on your browser. This message arises when you press send on the exercise having done this.

To try an exercise again, you need to click on the exercise title on the left of the screen or else click on the ‘arís’ button at the end of the exercise.

Please let me know if this doesn’t work.

Ádh mór,

Michelle