Details:

System.Data.Linq.ChangeConflictException: Row not found or changed. at System.Data.Linq.ChangeProcessor.SubmitChanges(ConflictMode failureMode) at System.Data.Linq.DataContext.SubmitChanges(ConflictMode failureMode) at SquashCore.Person.SquashLevel(Nullable`1 date) in C:\Users\Ian\Documents\Projects\Squash\SquashCore\Person.cs:line 846 at SquashResults.Admin.ScoreCard.b__11_0(ClubMember c) in C:\Users\Ian\Documents\Projects\Squash\Leicestershire2024\Core\Admin\ScoreCard.aspx.cs:line 460 at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext() at System.Linq.Buffer`1..ctor(IEnumerable`1 source) at System.Linq.OrderedEnumerable`1.d__1.MoveNext() at System.Web.UI.WebControls.Repeater.AddDataItemsIntoItemsArray(IEnumerable dataSource, Boolean useDataSource) at System.Web.UI.WebControls.Repeater.PostGetDataAction(IEnumerable dataSource) at System.Web.UI.WebControls.Repeater.OnDataBinding(EventArgs e) at SquashResults.Admin.ScoreCard.OnPreRender(EventArgs e) in C:\Users\Ian\Documents\Projects\Squash\Leicestershire2024\Core\Admin\ScoreCard.aspx.cs:line 476 at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)