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Error:

  • December 4, 2025
  • 1 reply
  • 17 views
T
Explorer

Hello,

 

Three of my collegueas where developing in our dev enviroment. And when trying to save the project, we got the error:

An error occurred while saving the project to the database.

An item with the same key has already been added.

Detailed error:
An error occurred while saving the project to the database.

Er is al een item met dezelfde sleutel toegevoegd.

Details:

Er is al een item met dezelfde sleutel toegevoegd.
Module: mscorlib
System.ArgumentException
bij System.ThrowHelper.ThrowArgumentException(ExceptionResource resource)
bij System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add)
bij TimeXtender.DataManager.ProjectPerspective.AddProjectPerspectiveItem(ProjectPerspectiveItemsRow itemRow)
bij TimeXtender.DataManager.Project.InitProject(Int32 version, DsProject loadDsProject, DataSet adaptersDataSet, ProjectsRow projectRow)
bij TimeXtender.DataManager.Project.LoadProject(DsProject _dsProject)
bij TimeXtender.DataManager.Project.<>c__DisplayClass136_0.<LoadProject>b__0()
bij TimeXtender.DataManager.ConnectingThread.ExecuteConnectingThread(Object dummy)

Er is al een item met dezelfde sleutel toegevoegd.
Module: timeXtender
TimeXtender.DataManager.ExceptionWrapperException
bij TimeXtender.DataManager.ConnectingThread.HandleError()
bij TimeXtender.DataManager.ConnectingThread.Execute(String title, Int32 progressSteps, List`1 actions)
bij TimeXtender.DataManager.Project.LoadProject(Guid _projectId, LockStrategy _lockStrategy, Int32 version, IWin32Window dialog, String projectName, String title)
bij TimeXtender.DataManager.ProjectController.LatestProject(Guid guid, LockStrategy lockStategy)
bij TimeXtender.DataManager.SaveProjectCommand.LoadProject(Guid projectId, Int32 version, LockStrategy lockStategy)
bij TimeXtender.DataManager.SaveProjectCommand.Execute()

Time: 2025-12-04 11:58:07
UTC: 2025-12-04 10:58:07
Title: TX_Informatieloket - TimeXtender 20.10.45.64
Application: 20.10.45.64
Repository: 20.10.45.64
SQL Server: Microsoft SQL Server 15.0.4410.1 NT x64
User: tbakker
Domain: NETWERK
OS: Microsoft Windows Server 2022 Standard
OS version: Microsoft Windows NT 6.2.9200.0
Machine name: RD170
CPU count: 6
Build: 64 bit

Could someone please help us. We are not able to work.

 

I have already submitted a ticket with number #38101 

Best answer by Thomas Lind

Hi ​@Timmm 

The right procedure is to contact us by creating a ticket. We require help from the developers to find what have made it get this error and what to change to gain access again.

This is usually caused by multiple people working on the same fields at the same time. So someone deletes a field that another uses in a lookup and similar. 

The best way to avoid getting this issue in the first place is to always use Work Items
 

And by always choosing the Save and reload option before deploying.

Doing this will make all changes part of the project you are about to deploy and likely avoid any issues like the ones explained above.

1 reply

Thomas Lind
Community Manager
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  • Thomas Lind
  • Community Manager
  • Answer
  • December 5, 2025

Hi ​@Timmm 

The right procedure is to contact us by creating a ticket. We require help from the developers to find what have made it get this error and what to change to gain access again.

This is usually caused by multiple people working on the same fields at the same time. So someone deletes a field that another uses in a lookup and similar. 

The best way to avoid getting this issue in the first place is to always use Work Items
 

And by always choosing the Save and reload option before deploying.

Doing this will make all changes part of the project you are about to deploy and likely avoid any issues like the ones explained above.

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