Workspace error

Please help to identify the problem!


Error Message:
==============================================

System.Web.Services.Protocols.SoapException: Server was unable to process request. ---> System.ArgumentException: These columns don't currently have unique values.
at System.Data.ConstraintCollection.AddUniqueConstraint(UniqueConstraint constraint)
at System.Data.ConstraintCollection.Add(Constraint constraint, Boolean addUniqueWhenAddingForeign)
at System.Data.ConstraintCollection.Add(Constraint constraint, Boolean addUniqueWhenAddingForeign)
at System.Data.DataRelationCollection.DataSetRelationCollection.AddCore(DataRelation relation)
at System.Data.DataRelationCollection.Add(DataRelation relation)
at System.Data.DataRelationCollection.Add(String name, DataColumn parentColumn, DataColumn childColumn)
at WorkSpaceService.FilterService.GetReportTemplate(String UserToken)
--- End of inner exception stack trace ---

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.Web.Services.Protocols.SoapException: System.Web.Services.Protocols.SoapException: Server was unable to process request. ---> System.ArgumentException: These columns don't currently have unique values.
at System.Data.ConstraintCollection.AddUniqueConstraint(UniqueConstraint constraint)
at System.Data.ConstraintCollection.Add(Constraint constraint, Boolean addUniqueWhenAddingForeign)
at System.Data.ConstraintCollection.Add(Constraint constraint, Boolean addUniqueWhenAddingForeign)
at System.Data.DataRelationCollection.DataSetRelationCollection.AddCore(DataRelation relation)
at System.Data.DataRelationCollection.Add(DataRelation relation)
at System.Data.DataRelationCollection.Add(String name, DataColumn parentColumn, DataColumn childColumn)
at WorkSpaceService.FilterService.GetReportTemplate(String UserToken)
--- End of inner exception stack trace ---

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:



[SoapException: System.Web.Services.Protocols.SoapException: Server was unable to process request. ---> System.ArgumentException: These columns don't currently have unique values.

at System.Data.ConstraintCollection.AddUniqueConstraint(UniqueConstraint constraint)

at System.Data.ConstraintCollection.Add(Constraint constraint, Boolean addUniqueWhenAddingForeign)

at System.Data.ConstraintCollection.Add(Constraint constraint, Boolean addUniqueWhenAddingForeign)

at System.Data.DataRelationCollection.DataSetRelationCollection.AddCore(DataRelation relation)

at System.Data.DataRelationCollection.Add(DataRelation relation)

at System.Data.DataRelationCollection.Add(String name, DataColumn parentColumn, DataColumn childColumn)

at WorkSpaceService.FilterService.GetReportTemplate(String UserToken)

--- End of inner exception stack trace ---]

Microsoft.VisualBasic.CompilerServices.LateBinding.LateGet(Object o, Type objType, String name, Object[] args, String[] paramnames, Boolean[] CopyBack) +965

Workspace.Net.ReportTemplateList.Page_Load(Object sender, EventArgs e) +462

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

System.Web.UI.Control.LoadRecursive() +47

System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1061