I recently copied material from one course to another course shell using course copy. I edited one of the copied pages in the new course to make it unique to that course, but Canvas made the exact same changes to the original source page in the source course as if there weren't two separate pages, but a hyperlink of a page from the original course into the new course. That is not what I intended. Why did that happen and how do I make the copies of pages unique in each destination course shell?