[X# 3] Renaming of file does not update the entries in the solution explorer

We use the old project format.
If a file is added, and after that renamed the old entrie is displayed inside of the solution explorer. The project file seems to be correct

<img width="379" height="233" alt="Image" src="https://github.com/user-attachments/assets/3edd84f0-ef98-42c5-985b-25f3403e07f8" />