0 Rocks won't start - An item with the same key has already been added?? 1 Knolly Shadrache posted 7 Years Ago HEELLPP!! I haven't changed anything so I've no idea why this is happening!Here's the start page...ArgumentException in mscorlib Message An item with the same key has already been added. Stack Trace at System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add) at Rock.Model.PersonService.GetUserPreferences(Person person) at Rock.Web.UI.RockPage.SessionUserPreferences() at Rock.Web.UI.RockPage.GetUserPreference(String key) at Rock.Web.UI.Controls.Grid.OnInit(EventArgs e) at System.Web.UI.Control.InitRecursive(Control namingContainer) at System.Web.UI.Control.InitRecursive(Control namingContainer) at System.Web.UI.Control.InitRecursive(Control namingContainer) at System.Web.UI.Control.InitRecursive(Control namingContainer) at System.Web.UI.Control.InitRecursive(Control namingContainer) at System.Web.UI.Control.InitRecursive(Control namingContainer) at System.Web.UI.Control.InitRecursive(Control namingContainer) at System.Web.UI.Control.InitRecursive(Control namingContainer) at System.Web.UI.Control.InitRecursive(Control namingContainer) at System.Web.UI.Control.InitRecursive(Control namingContainer) at System.Web.UI.Control.InitRecursive(Control namingContainer) at System.Web.UI.Control.InitRecursive(Control namingContainer) at System.Web.UI.Control.AddedControl(Control control, Int32 index) at Rock.Web.UI.RockBlockWrapper.CreateChildControls() at System.Web.UI.Control.EnsureChildControls() at Rock.Web.UI.RockPage.OnInit(EventArgs e) at System.Web.UI.Control.InitRecursive(Control namingContainer) at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)Thanks