InvalidOperationException: Cannot access part because parent package was closed.

[JPluess]

Describe the bug

System.InvalidOperationException: Cannot access part because parent package was closed.
   at System.IO.Packaging.PackagePart.ThrowIfParentContainerClosed()
   at System.IO.Packaging.PackagePart.GetRelationshipHelper(String id)
   at System.IO.Packaging.PackagePart.RelationshipExists(String id)
   at OfficeRibbonXEditor.Documents.OfficePart.RemoveImage(String imageId) in C:\Users\FernA\agent\_work\1\s\src\OfficeRibbonXEditor\Documents\OfficePart.cs:line 149
   at OfficeRibbonXEditor.ViewModels.Documents.OfficePartViewModel.RemoveIcon(String id) in C:\Users\FernA\agent\_work\1\s\src\OfficeRibbonXEditor\ViewModels\Documents\OfficePartViewModel.cs:line 79
   at OfficeRibbonXEditor.ViewModels.Windows.MainWindowViewModel.ExecuteRemoveCommand() in C:\Users\FernA\agent\_work\1\s\src\OfficeRibbonXEditor\ViewModels\Windows\MainWindowViewModel.cs:line 562

To Reproduce
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Screenshots
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Additional context

• Version: 1.9.0.1056
• Runtime: .NET 6.0.25
• Operating System: Microsoft Windows 10.0.22631