What does overwrite protection on a layout prevent a user from doing?

Overwrite protection on a layout is designed to prevent a user from saving changes to an item that has been modified by another process. This is crucial in systems where multiple users might interact with the same data or records, as it ensures that no conflicting updates occur, which could lead to data integrity issues.

By implementing overwrite protection, the system creates a safeguard that requires the user to be aware if another user or process is currently modifying an item. This mechanism ensures that any changes made are intentional and based on the most current version of the item, thus protecting the accuracy and reliability of the data being handled.

The other options involve permissions and access control, where users may not have the ability to edit or delete items based on their roles and rights within the system. Overwrite protection specifically addresses the issue of simultaneous modifications, which is central to maintaining data integrity in collaborative environments.