The driver currently assigns a default value of 0 to nModified due to the server bug SERVER-113026, where the server failed to return nModified when no documents were modified. This workaround should be removed once the minimum supported server version includes the fix.

Current behavior:
The driver sets nModified = 0 by default to handle missing field responses from affected server versions.

Intended behavior:
When all supported server versions reliably return nModified, the driver should no longer provide a default value.

Acceptance criteria:

• Confirm that all supported server versions contain the SERVER-113026 fix.
• Remove the default nModified being 0 logic and comment marked with TODO-JAVA-6005.