[BUG] Imported via JSON and the diagram fails to save

Describe the bug Imported the diagram via json and then even after making some manual changes it says failed to save.

To Reproduce Steps to reproduce the behavior:

1. Go to file
2. Click on import from and then JSON
3. upload the file tables will appear but will not save
4. see error near help on the top menu saying "Failed to save"

Expected behavior Diagram should save and should be able to fetch the saved diagram from the list

Desktop (please complete the following information):

• OS: Mac os 27
• Browser: ulaa (Chromium based)