I've create a page "Foo" with slug "foo"
Than I've created "Bar" as a subpage of "Foo" with slug "bar" so that the permalink to "Bar" is:
Even if I rename the slug of "Foo" into "lol", it seems I cannot propagate the modification to the permalink that leads to "Bar", it remains /foo/bar/ and not /lol/bar/ and I cannot rename it from the admin, it only permits to rename the "bar" part, from the "Bar" page propertis. I had to dig into the database and did it by hand.
Is it true?