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Protected document creation error

The attached document is created protected by aspose. However, it is seen that the articles in the diagram can be changed. Test application for control is attached.
AsposeTestProject.zip (2.9 MB)

@srmbimser,
We have observed the issue using the latest version and logged it in our database for further investigation. You will be notified here once any update is ready for sharing.

This issue is logged as:
CELLSNET-48099 - Sheet protection is not effective for diagrams