SharePoint App Deployment Error

Question

When I go to SharePoint 2019 Site Contents-> K2 Five For SharePoint -> Manage App Deployments. It then throws a correlation id error. Checking the logs I get "An entry with the same key already exists". Please advice

Application error when access /_layouts/15/DeployTSApp.aspx, Error=An entry with the same key already exists. at System.ThrowHelper.ThrowArgumentException(ExceptionResource resource) at System.Collections.Generic.TreeSet1.AddIfNotPresent(T item) at System.Collections.Generic.SortedDictionary2.Add(TKey key, TValue value) at Microsoft.SharePoint.ApplicationPages.DeployTSAppPage.AddItemToPicker(List1 selectedItems, SortedDictionary2 selectedItemsToAddToPicker, GroupedItemPicker picker, String id, String name, String description, String group) at Microsoft.SharePoint.ApplicationPages.DeployTSAppPage.AddItemsForLanguage(UInt32 lcid, SortedDictionary2 selectedItemsToAddToPicker, Dictionary2 alreadyAddedTemplates) at Microsoft.SharePoint.ApplicationPages.DeployTSAppPage.LoadSiteTemplatesPicker() at Microsoft.SharePoint.ApplicationPages.DeployTSAppPage.OnLoad(EventArgs e) at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
Unexpected System.ArgumentException: An entry with the same key already exists. at System.ThrowHelper.ThrowArgumentException(ExceptionResource resource) at System.Collections.Generic.TreeSet1.AddIfNotPresent(T item) at System.Collections.Generic.SortedDictionary2.Add(TKey key, TValue value) at Microsoft.SharePoint.ApplicationPages.DeployTSAppPage.AddItemToPicker(List1 selectedItems, SortedDictionary2 selectedItemsToAddToPicker, GroupedItemPicker picker, String id, String name, String description, String group) at Microsoft.SharePoint.ApplicationPages.DeployTSAppPage.AddItemsForLanguage(UInt32 lcid, SortedDictionary2 selectedItemsToAddToPicker, Dictionary2 alreadyAddedTemplates) at Microsoft.SharePoint.ApplicationPages.DeployTSAppPage.LoadSiteTemplatesPicker() at Microsoft.SharePoint.ApplicationPages.DeployTSAppPage.OnLoad(EventArgs e) at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) 61c90da0-f750-30ba-205f-65faaae43ba7
12/18/2021 01:00:34.61 w3wp.exe (:0x1A14) 0x3054 SharePoint Foundation General ajlz0 High Getting Error Message for Exception System.Web.HttpUnhandledException (0x80004005): Exception of type 'System.Web.HttpUnhandledException' was thrown. ---> System.ArgumentException: An entry with the same key already exists. at System.ThrowHelper.ThrowArgumentException(ExceptionResource resource) at System.Collections.Generic.TreeSet1.AddIfNotPresent(T item) at System.Collections.Generic.SortedDictionary2.Add(TKey key, TValue value) at Microsoft.SharePoint.ApplicationPages.DeployTSAppPage.AddItemToPicker(List1 selectedItems, SortedDictionary2 selectedItemsToAddToPicker, GroupedItemPicker picker, String id, String name, String description, String group) at Microsoft.SharePoint.ApplicationPages.DeployTSAppPage.AddItemsForLanguage(UInt32 lcid, SortedDictionary2 selectedItemsToAddToPicker, Dictionary2 alreadyAddedTemplates) at Microsoft.SharePoint.ApplicationPages.DeployTSAppPage.LoadSiteTemplatesPicker() at Microsoft.SharePoint.ApplicationPages.DeployTSAppPage.OnLoad(EventArgs e) at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) at System.Web.UI.Page.HandleError(Exception e) at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) at System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) at System.Web.UI.Page.ProcessRequest() at System.Web.UI.Page.ProcessRequest(HttpContext context) at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step)

Answer 1

Hi @shashank ,

This error is due to orphan PWA instances.

The solution is to check orphan entries in the service application and remove them by PowerShell.

$PWA = Get-SPServiceApplication | ?{$_.DisplayName -like "Project Server Service Application"}  
$PWA.SiteCollection | Select Name, ID, @{N='DatabaseName';E={$_.ProjectServiceDatabase.Name}}  
$RemoveEntry = $PWA.SiteCollection | ?{$_.Id -eq ""}  
$RemoveEntry.Delete()  

Here are a few similar cases for your reference:

• An entry with the same key already exists.
• Database attach error : An item with the same key has already been added
• PWA error: An entry with the same key already exists

Thanks,
Echo Du

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Answer 2

Hi ! To Whom It May Concern

I would like to seek your advise on how to resolve this error message which I had never encounter before.

Please kindly refer to my screenshot image which is for your own reference.

I am looking forward to hearing from you as soon as possible.

Your help is much appreciated

Warmest Regards ,
Gan Yu Shen THOLMAS