While the instructions in article 720830744 work, if someone edits the page/content right after, the owner reverts back to the original owner. You need to reboot the server to make Confluence "forget" about the original owner. Edits after the reboot keep the new owner/creator.
This isn't really a Question (it's really a Comment for article 720830744), so I'm going to try to "answer" and mark it closed.
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