XZise added a comment.
Unfortunately yes, copied from the documentation:
If the first argument is a Page, create a copy of that object. This can be used to convert an existing Page into a subclass object, such as Category or FilePage. (If the title is also given as the second argument, creates a copy with that title; this is used when pages are moved.)
TASK DETAIL https://phabricator.wikimedia.org/T57113
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