[ArgumentOutOfRangeException: 'ddlProducer' has a SelectedValue which is invalid because it does not exist in the list of items.
Parameter name: value]
System.Web.UI.WebControls.ListControl.PerformDataBinding(IEnumerable dataSource) +2693966
System.Web.UI.WebControls.ListControl.OnDataBinding(EventArgs e) +290
System.Web.UI.WebControls.ListControl.PerformSelect() +37
System.Web.UI.WebControls.BaseDataBoundControl.DataBind() +74
TierMaster.refreshDropDowns() in D:\ehrmannswines.co.uk\TierMaster.master.vb:260
TierMaster.Page_Load(Object sender, EventArgs e) in D:\ehrmannswines.co.uk\TierMaster.master.vb:78
System.Web.UI.Control.OnLoad(EventArgs e) +95
System.Web.UI.Control.LoadRecursive() +59
System.Web.UI.Control.LoadRecursive() +131
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +678
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