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Vivado - All IP Sources are 'Read-only' in the Source File Properties
When creating an IP source in Vivado Design Suite, it is always identified as 'Read-only: Yes' in the Source File Properties window.
Vivado always marks XCO/XCI files as read-only, meaning that a user cannot modify or edit the contents of the file from within the Vivado text editor.
Instead, when double-clicking or opening the file, the re-customization GUI is used to modify this file.