Server Error in '/' Application.

This constraint cannot be enabled as not all values have corresponding parent values.

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.ArgumentException: This constraint cannot be enabled as not all values have corresponding parent values.

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:


[ArgumentException: This constraint cannot be enabled as not all values have corresponding parent values.]
   System.Data.ConstraintCollection.AddForeignKeyConstraint(ForeignKeyConstraint constraint) +2477980
   System.Data.ConstraintCollection.Add(Constraint constraint, Boolean addUniqueWhenAddingForeign) +498
   System.Data.DataSetRelationCollection.AddCore(DataRelation relation) +1173
   System.Data.DataRelationCollection.Add(DataRelation relation) +182
   System.Data.DataRelationCollection.Add(DataColumn parentColumn, DataColumn childColumn) +70
   Telerik.Web.UI.ControlDataBinder.BindToDataTable(DataTable table, String dataFieldID, String dataFieldParentID) +125
   System.Web.UI.WebControls.DataBoundControl.OnDataSourceViewSelectCallback(IEnumerable data) +208
   System.Web.UI.WebControls.BaseDataBoundControl.EnsureDataBound() +134
   Telerik.Web.UI.RadTreeView.OnPreRender(EventArgs e) +57
   System.Web.UI.Control.PreRenderRecursiveInternal() +132
   System.Web.UI.Control.PreRenderRecursiveInternal() +227
   System.Web.UI.Control.PreRenderRecursiveInternal() +227
   System.Web.UI.Control.PreRenderRecursiveInternal() +227
   System.Web.UI.Control.PreRenderRecursiveInternal() +227
   System.Web.UI.Control.PreRenderRecursiveInternal() +227
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3671


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4690.0