[InvalidOperationException: Collection was modified; enumeration operation may not execute.]
System.Collections.HashtableEnumerator.MoveNext() +14798936
Sitecore.Data.DataProviders.Sql.SqlDataProvider.UpdateItemFields(ID itemId, ItemChanges changes) +742
Sitecore.Data.DataProviders.Sql.<>c__DisplayClass1d.<SaveItem>b__1b() +121
Sitecore.Data.DataProviders.NullRetryer.ExecuteNoResult(Action action, Action recover) +232
Sitecore.Data.DataProviders.Sql.SqlDataProvider.SaveItem(ItemDefinition itemDefinition, ItemChanges changes, CallContext context) +193
Sitecore.Data.DataProviders.DataProvider.SaveItem(ItemDefinition item, ItemChanges changes, CallContext context, DataProviderCollection providers) +124
Sitecore.Data.DataSource.SaveItem(ID itemID, ItemChanges changes) +76
Sitecore.Data.Engines.EngineCommand`2.Execute() +97
Sitecore.Data.Engines.DataEngine.SaveItem(Item item) +145
Sitecore.Data.Managers.ItemProvider.SaveItem(Item item) +322
Sitecore.Data.Items.ItemEditing.AcceptChanges(Boolean updateStatistics, Boolean silent) +205
Sitecore.Shell.Framework.Sorting.SetSortorder(Item item, Int32 sortorder) +323
Sitecore.Shell.Framework.Sorting.MoveLast(Item[] items) +241
Sitecore.Sites.MultiSitesManager.ArrangeSitesContext() in D:\builds\Dev\delivery\MultipleSitesManager\MultiSitesManager.cs:221
Sitecore.Sites.MultiSitesManager.Process(HttpRequestArgs args) in D:\builds\Dev\delivery\MultipleSitesManager\MultiSitesManager.cs:254
(Object , Object[] ) +167
Sitecore.Pipelines.CorePipeline.Run(PipelineArgs args) +328
Sitecore.Nexus.Web.HttpModule.(Object , EventArgs ) +509
System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +139
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +91
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