[Sirius][Diagram] Exception during Undo/Redo

Bugzilla Link	582197
Status	ASSIGNED
Importance	P3 normal
Reported	Jul 13, 2023 11:42 EDT
Modified	Jul 17, 2023 06:03 EDT
Version	0.7.0

Description

We get several Undo/Redo exceptions. Here several ways to get a such exceptions
Component Diagram:

• Create 3 Components
• Create a link between 2 Components (A Substituion for example)
• Retarget the link (source or target) to the 3rd Component
• do Undo, Undo, Undo, -> you will get an Exception
  
  Package Component:
• Create a Model and a Package (for example)
• Create a Dependency between the Model and the Package)
• Delete the Graphical view of the Model
• Drop the Dependency from the ModelExplorer -> the Model and the Dependency are now represented on the Diagram
• Undo, Undo, Undo > it breaks with org.eclipse.core.commands.ExecutionException: Undo of operation was rolled back (possibly due to concurrent write)
  
  DeploymentDiagram :
  as previously, with a Dependency between an ExecutionEnvironement and a Node.
  Such bugs can be reproduced with the pure Sirius version of the Papyrus-Sirius uml editor.