[ConstraintException: Failed to enable constraints. One or more rows contain values violating non-null, unique, or foreign-key constraints.]
System.Data.DataTable.EnableConstraints() +500
System.Data.DataTable.set_EnforceConstraints(Boolean value) +40
System.Data.DataTable.EndLoadData() +215
System.Data.Common.DataAdapter.FillFromReader(DataSet dataset, DataTable datatable, String srcTable, DataReaderContainer dataReader, Int32 startRecord, Int32 maxRecords, DataColumn parentChapterColumn, Object parentChapterValue) +242
System.Data.Common.DataAdapter.Fill(DataTable[] dataTables, IDataReader dataReader, Int32 startRecord, Int32 maxRecords) +359
System.Data.Common.DbDataAdapter.FillInternal(DataSet dataset, DataTable[] datatables, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior) +169
System.Data.Common.DbDataAdapter.Fill(DataTable[] dataTables, Int32 startRecord, Int32 maxRecords, IDbCommand command, CommandBehavior behavior) +157
System.Data.Common.DbDataAdapter.Fill(DataTable dataTable) +106
Portal23.DataSet1TableAdapters.GetNationalOfficerContactInfoTableAdapter.GetNationalContactInfo() in C:\Users\shiel\source\repos\Portal23\DataSet1.Designer.cs:66231
Portal23.Contact.Page_Load(Object sender, EventArgs e) in C:\Users\shiel\source\repos\Portal23\Contact.aspx.cs:13
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +85
System.Web.UI.Control.OnLoad(EventArgs e) +79
System.Web.UI.Control.LoadRecursive() +130
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2852
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